My friend did the following when his subzero fridge broke and neither subzero or Pacific sales helped him resolve it.

He took his SUV and parked it right in front Pacific Sales entrance, and put a very large sign on his windshield and rear windows that said something like “Ask me how I really feel about the warranty for my broken SubZero fridge I bought from Pacific Sales” with a phone number… Pacific Sales called SubZero,.and SubZero got back to my friend really really quickly.

More expensive appliances don’t necessarily perform better or last longer than cheaper tried and true appliances. Buying a Bosch is like buying a BMW. They start out nice looking and perform nice. But eventually they will break down due to their complexity and unless you know how to fix them yourself, be prepared to pay an arm and leg for repairs.