Warranty not honoured

On the 17th of October 2022 I called hi fi corp Amanzimtoto store number 1163 and informed Luka from customer service that my TV, a 50 inch Sinotec, was not working as the screen was flickering. The said tv was purchased in 2020 and carried a 5 year warranty. I was immediately told that I should not bring the TV back to the store because of the size and that a technician would come out to me.I was instead given an email address to submit a copy of the purchase slip and pictures of the TV which I did immediately. On the 19th of October I went to the same store to purchase another item.Whilst there I went to the customer service department to check on the progress of my complaint and spoke to Bianca as Luka was on his day off. She reiterated that I should leave the TV on the wall and not transport it by myself because of the size of the TV. She escalated the matter to the repair center and provided me with confirmation in writing which is in my possession. On the 25th of October 2022 I was contacted by a lady from Fastcare service centre who told me that I had to take the tv to the store by myself and that a technician only comes out to site for any tv that is above 50 inches. I told her what both customer care assistance Luka and Bianca had told me. She insisted that I take it by myself to the store with the original packaging. I had to remind her that the tv was purchased 2 years ago and that nobody keeps the packaging for so long. Anyway the very next day ie the 26th of October 2022 I carefully wrapped the tv in a duvet and took it to the store. Upon arrival I spoke to Luka and told him to give me a written letter stating that I had brought in the tv by myself as requested. Luka and I then offloaded the tv and he plugged it in to check what was wrong. He confirmed infront of a witness that the backlight of the tv was faulty and other than that there was no physical damage. He stated that the tv would be repaired as the warranty covered the fault. He then took the tv to the back of the store and went to complete the paperwork. About 10 minutes later he called me and I assumed that the paperwork was complete however I was met by the manager together with Luka who said that he had made a mistake and that the tv screen was cracked. This was never the case during the 1st inspection done at the front of the store earlier. The Manager became very rude and told me to take my tv back as there was nothing he could do. The same manager who refused to give me confirmation that I had brought in the tv using my own car. The managers name is Patrick. Hi fi corp is refusing to honor their warranty.