UPC Optical Fiber vs Orange: Damaged Coaxial Cable in New Apartment - Installation Issues

Hi,
recently rented a new apartment. Immediately after moving, I wanted to embrace the Internet. I checked what internet providers are available to me. It turned out that I can get optical fiber from Orange or UPC. UPC already had wiring in the apartment itself, in addition, I saw that the previous tenant had a UPC modem at home. As for Orange, the nearest box is on the mezzanine, so bringing it to the apartment would be much more problematic. It would require the approvals of the Cooperative etc. The choice was therefore obvious and fell on the UPC. So I ordered a fiber-optic internet service from them - I know that it is not strictly optical fiber - in addition, the package included a basic TV package, it was impossible to omit it, although I do not care about it.

After a few days, the fitter showed up and started the installation. Initially, everything went smoothly for him, but after a while he said that he had a problem with registering the modem, that the parameters shown on the phone were incorrect. He informed me that the Internet could work on the parameters that showed him, but it was physically impossible to register the modem, so he had to withdraw from the installation. He told me he thought it was the damaged coax cable coming out of the wall to blame.
As far as I understood it, the copper wire coming out of the cable is far too short and therefore cannot properly connect the modem. In addition, he cannot cut the cable and earn it again, because the cable itself coming out of the wall is, in his opinion, too short (I can't measure it now, but I think that 3-5cm of cable comes out of the wall).
The fitter informed me that the least invasive option I have would be to chuck a piece of wall around the cable, pull it out, and earn it again. However, it doesn't give me a 100% chance it will work. Another, more reliable option would be to replace the entire cable in the apartment. However, the owner of the apartment will never agree to this, and it does not suit me either, it would be easier to arrange Internet Orange.

But in general the whole situation seems very strange to me. The previous tenant had UPC internet, and did not mention any problems related to it. And now it suddenly doesn't work and a damaged cable is to blame?

What do you think about it? After returning to the apartment, I will throw in pictures of the cable itself coming out of the wall.

I do not believe ... is it really the installation of 2 connectors on the cable and the use of the so-called barrel, i.e. a connector, surpassed this fitter? In that case, I would contact UPC itself and ask why the service was not performed.

UPC itself also seems to be acting rather slowly. Installation was Friday. The fitter informed me that the sales representative would definitely be in touch on Monday. As no one answered until 1pm, I tried to contact UPC myself. Through the hotline, I was able to connect with the technical department, there I received information that they are already sending an e-mail to my sales representative with a request to contact me. I was expecting a call on the same day. Of course, no contact so far.
I know that maybe I am looking for a terribly impatient client, since I am irritated by the lack of immediate contact. But it seemed to me that today's level of customer service, especially in such corporations, should be slightly higher.

And this wire is not "freshly" cut? Maybe the previous tenant "cleaned up" to take, for example, 4m of cable.
It's such a technology that cable attenuation matters.
There are technicians here, because they repeatedly ask for indications from UPC modem-routers and refer to the situation.
Weak cable, high attenuation and such 250 Mb / s will not fly anymore. The predecessor may have had some old offer, e.g. up to 30 Mb / s and Mu worked.

I don't think the previous tenant could actually clean that up. But it is an option.
He lived there for a year, I'm not sure if UPC could have had such weak internet on offer at that time.

Someone mentioned that at 3 cm there is no problem with inserting the plug. Yes, it is probably possible: https://www.dipol.com.pl/zlacze_f_nakrecane_stalowe_5_5_mm_100szt__E8020.htm
But if they use this type of compression: https://www.dipol.com.pl/zlacze_komprescyjne_f_113_master_na_pkuje_triset-113_E80342.htm, it's already a problem, because you won't go to Praga.
Going further, however, the fitter probably put something on since he connected the modem. I can't imagine that he put a bare cable into the modem socket and "measured" the parameters.
On the other hand, I don't install it, but don't UPC fitters have meters? Only the parameters are previewed in the modem?
Or is it just a conflict at the address? There is another modem in the system in the "hanging" style and it is not possible to add another one.

Don't be discouraged just try to explain it.

Exactly 6 cm of cable comes out of the wall itself, including the connector. The core itself coming out of the cable is actually quite short, when I looked at it on the net, it is usually much longer. There is also a splitter in the photo, which was used by the fitter, the splitter was connected to the cable from the wall, while the cable itself was connected to the modem.
However, he checked the parameters on a smartphone, I have not seen him use any other devices.

The main vein is usually cut flush with the collar and it works. It sticks out for you, so that's not the problem. The plug is definitely intact. You can see the paint or putty streak. If he cut the plug, he would rather not put on another one. He probably logs in via WiFi to the modem-router and views the parameters.

I see. In that case, in fact, there is probably nothing else to do but wait what the next UPC service technicians will tell me. The owner agreed to cut up a fragment of this wall around the cable. So let them try.
There is the problem with Orange, which I wrote about at the beginning, a box on the mezzanine, no cables in the apartment. So it would have to be pulled into the apartment. I know that this is not a major problem and the service will deal with it quickly. The problem will be rather the issue of the consent of the cooperative to perform work in the stairwell.

@MrBeo
This terminal looks as if it was installed several years ago, and then there were different speeds and other requirements for the installation itself in the customer's premises (tightness and ingress). It is not surprising that the installer resists, because he is responsible for the installation of the service with his head (and finances) and no one wants to be under the influence.
The apartment could be renovated, the cable may have been damaged during the renovation, there may also be a problem with the input of the cable itself and the signal to the apartment.
With plastered cables, God knows what is there, what class the cable is (requires triple shielding), the plugs should be compression.
And something must have been a problem before, because why would the fitter install a splitter only for the modem, if he left the second output loaded with a resistor.
Since there is only an internet service, no splitter is used.

I see. Tomorrow the fitter comes again to try to connect. They have permission to tear apart a fragment of the wall, so if it proves to be enough, it will all end well. If not, he will resign from UPC. I don't want to play with puttying the whole apartment after replacing the cable.

MrBeo wrote:

If not, he will resign from UPC.

The new op, Orange will put its wires anyway, in plain sight, and will drill into the wall to guide the fiber through.

Another fitter came today, he did it the first time. With the cables everything was ok, there was no need to cut anything or punch or anything like that.
As for the problem with the parameters, it turns out that the whole building has them, another team will come to take care of it.
So far, the internet does not reach even half of the purchased 500mb / s, but the fitter said that the modem is updating, in addition, my network card in the laptop has a good 8 years, so I will have to buy an external one or replace the current one.

Anyway, everything works. Thank you all for your support. greetings