Xiaomi Smartphone Failing After Warranty Expires

Two years ago, I made the decision to purchase a smartphone from Xiaomi. Shortly after the warranty on the device had run out, it began to experience various issues. It started with the cameras, then it was the fingerprint reader, and now the power button is gone. They estimated that it would cost an unbelievable 7,500 Turkish Lira to fix. When I contacted customer service, they asked for the IMEI number and then went completely silent, despite the numerous times that I tried to get a response from them.