Pathetic customer service

I bought a Hisense HS U939 phone from Game in Westwood a few months back. After using the phone for 3 months it started coming up with a white screen and because the phone was new and under warranty I followed Games process and sent the phone in for repairs on the 10/8/15. When I received my phone back on the 24/08/15 I was advised that no fault was found and that my phone was working fine. It worked for 1 day and the white screen appeared again so I was advised to rebook my phone in for repairs 26/8/15. When I received my phone on the 9/9/15 I was advised that the LCD was changed and that my phone is working fine. Only one day later my phone started to switch off randomly and there is a human hair under the LCD screen that they installed. They now want me to send my phone back again after only using it for 3 days the entire month ? This is impacting my life as I use my phone for work. I hate this phone now after experiencing all these issues and all I want is a refund and an inconvenience voucher but Game have advised that I need to send it back in again before they can do this ? The repairs process is shocking and as a customer I will go to another store with my business.PATHETIC