Game pavilion SD me a damaged TV and don't want to help

Hi bought a brand new TV for R7000 from Game pavilion shopping center. The TV started giving me issues within the first 2 days. I emailed them and they didn't respond. I told them it's not acceptable for a brand new TV to go completely blank while watching. Furthermore, it sometimes doesn't want to come on at all. They think I'm just suppose to accept a repair on a brand new TV. A brand new TV should not be repaired. This means they sold me damaged goods. They are just ignoring my request for a credit and full refund. I also contacted Hisense. I told the manager to give me a full credit. He has not contacted me either. He's just ignoring my request.