The fridge is freezing the products which touch the back, also there's also a layer of frozen condensation on the back wall...
Has anyone faced the same? Any solution / advice ?
Yes, I always have this problem if I'm not careful with delicate vegetables or fruit. I couldn't find a no-frost fridge with a fan in this size at the time. Fruit and veg in the drawer, beer on the shelves, then it works :-) There are crossbars from other manufacturers that are mounted in front of the rear wall and alleviate the problem.