HIFI Corporation Refusal to assist on faulty TV

My television set broke on the 25/03/2020 and because the lockdown was going to implemented I then bought a TV at the Hifi Corporation in Fourways Crossing on the 26/03/2020. The sales staff were really raving about how I made the best choice of buying the Skyworth TV 50" which they recommended as the best TV due to its capabilities. About 3 weeks after buying the TV we noticed that it had difficulties switching on and we would have to try it a couple of times before it could turn on. Soon the problem went away and it was working fine. On the 27/05/2020 the TV just refused to switch on via the remote and it has not been working ever since. I contacted the store on the 27/05/2020 and spoke to Elliot, the sales manager. After informing him of my problem, he said the only recourse was for them to send a technician to look at the problem. He said that would take 14 to 21 days. He said he was not sure when the technicians would go back to work during the current lockdown. I then told him that I can't wait for an indefinite period and that I would then prefer to return the product and that they give me my money back so that I can purchase another TV when we move to level 3 of the lockdown on the 01/06/2020. He said they can't refund me and that their process and policy was for me to wait for them to send a technician. I asked to speak to a senior and the person on the line introduced herself as Jenny the store manager. She was very rude and condescending. She didn't show any empathy to my situation. I asked her why are they not informing the customers about their processes and policy. She rudely said that she did not personally sell me the TV. I find that bizarre that as a store manager is not responsible for the sales that talk directly to the performance of the store. The email that I sent to Elliot on the 27/05/2020 has still not been acknowledged and I have still not been informed when to expect the technicians. This experience has left us as a family in a state of depression. The absence of the television is really hitting us hard. We therefore request an urgent intervention of either a refund or replacement unit. We just can't afford to wait indefinitely for the technicians to come out. Pls assist