I'll treatment by Game store Game city Durban

Hi I bought a 58 cm Telefunken TV 10 January 2020 at Game Durban Game City and when I got home I discovered that the TV was not showing the full picture and I then took it back on the 13th. Some guy by the name of Ismail came with a group of Indian colleagues and he told me there is nothing they can do because I signed the till slip to confirm that I was happy with the item and he believes that maybe I had an accident on my way home and broke the TV because it can't be his stuff because the guy who helped me when I purchased the TV Mr Xulu is a professional so he can't cause any damage to it. He was shouting and arguing with me in front of everyone and after a long argument he told me that he will return the item the factory to investigate the cause of the damage and he will get back to me before the end of the week but failed to do that. I tried to call him but no answer and then decided to personally go there to make a follow up and he made me to wait 30 minutes because he needed to help other customers then later told me that the investigation is still pending to date I am sitting without a TV nor the idea when will I get it back yet I purchased the item because I needed it and I really don't know when will I get my refund or another TV.