Game store not taking my complaint serious !! Lack of service

I have recently written to Game to inform them of a purchase I made on a poor quality phone., Xiaomi redni -warning it will be the worst thing you do .

I personally contacted game to let them know of the issues I have experiencing providing a detailed complaint but I have not had any assistance as yet .

I even provided screenshots of the issue I am experiencing , I need feedback from them and yet I await ... I am a new business woman and cannot afford to go and argue and spend days without a phone as they try to do something about a poor quality phone.

I have informed the consultant that I want an exchange because I cannot be without a phone for even a day ..I just need this to be sorted as convenient as possible. The phone heats up It freezes It can't drop calls when connected to Bluetooth It keeps saying "UPS NOT RESPONDING " MAPS location gets lost all the time . I am a client and I have tried to get this resolved as convenient as possible. .SERVICE ME AS YOUR CLIENT , Correctly pls