Very poor quality of hardware and software of HTC ...

Very poor quality of hardware and software of HTC phone. Life is less than one year. Pathetic after sale service. Company is doing business through service center. I got problem of mother board within one year of purchase of my HTC desire 816. Just after warranty period of one year, I got problem of display. When given to service center, I got my phone back after one and half month without repair with two more problem i.e. SIM tray and again mother board. Now company is not responding as both the problems were created by their service center. Service center and company are making money by creating new problems and fetching money from the customers. I do not know what to do with my phone?