Samsung RSH1 broken?

My fridge is out of warranty - quite curious because if I ask a simple question of Samsung they simply reply it is out of warranty and then point me to a bunch of totally untrained 'service partners' in France.
I have the full service manual btw. There are no diagnostic faults. Load mode usually shows that fans and things are running slowly. If I put it in forced mode it changes the fans but that is all. The compressor works fine. The temperature indications can be nice and low but in reality the internal temperatures are wildly different (-1bc in the freezer can be 0 or +3..).
I changed the evaporator cover in the fridge along with the sensors and heater.
I cannot get the fridge to be cold, the freezer is sometimes cold and the icemaker doesn't work. All this happened suddenly.

Since I can find no diagnostic problems, what on earth would a Samsung engineer do (assuming I can find one in France). Any ideas where I can go from here or should I simply bin it and buy new Chinese one?

I also notice that the surround of the minbar door is warm - should it be?