Experiencing Overheating Refrigerator and Over-Frozen Freezer - Possible Issues?

Hi. I have a problem with the built-in fridge freezer. I have no idea what this model or type is. The refrigerator heats up, the freezer freezes to a limescale, but in one place, as if at the end of that liquid tube. The aggregate works all the time, after the night it looks more or less like this (photo). Below in the drawer was an ice bag that had started to melt. Can anyone familiar with the subject see what the problem is here? Thank you very much for help.

Classic symptoms of a loss of refrigerant.

Thanks for the hint. As I wrote, it is built-in equipment, so in the case of replacement, I have to find the same size. Is refrigerant replenishment profitable? Is it better to buy new equipment.

Sam didn't run away, there's a hole somewhere in the system. If it is in an accessible place, it is still profitable, and if it is somewhere in the wall, the equipment must be replaced. And that would have to be stated by a specific guest with specific equipment.

Chupacabra thanks for your help. I can't handle it myself. I call a repairman with the equipment and either fix it or let it help find new equipment. Many thanks!