Apple IPhone ****

My IPhone 7 stopped working, the Istore said it is due to a design problem, they used the incorrect glue to mount some of the internal components, but because the warranty has expired a few months ago, it will cost R7000 to fix. Surely if you admit it is a design problem, the least you can do is repair at your cost, and the fact that the phone does not even have a scratch on it. Maybe I should get rid of my other 3x IPhones , 2x Ipads and Macbook just in case they go faulty too.