I once bought a tv from Migros, 9 years ago and when it went kaput within 4 months I was told that they will only take it back within the first 3 months. They did tell me to take it to G'başi as they dealt with the insurance firm. Not very good if you do not have a car is it?
I will NOT buy anything with a warranty from a supermarket here. My favourite is Eren Spot, their backup service is first class, sometimes they will help even when the Guarantee has run out. Okay you have to pay, but it is a nominal fee.