Hisense after sales service

Bought a 58 inch tv in may of 2019 from a hisense re-seller. The tv is still under warranty and would be for more than a year. On friday the tv just switched off with no sign of breakage. On Saturday I called the customer care team and they told me I need to go to store.the store told me it woll take 21 days. I then call again on Monday and eas told I could get a technician out in 3 days. I was told my tv would be fixed, if this was offered on saturday then I would not need to wait till Wednesday and technician would be with me on monday.this is very poor service from a company of this size. I bought hisense as I felt the service would be good and the product would last much longer than the big brands. If I knew this would be the case , I would have bought Samsung as I could walk in any care centre and get service I need. The technician eventually came out today and said he cant fix on site and would need to take it away and this will take 3 weeks. I am now about to sit for 3 weeks without a tv and I think this is unacceptable as I paid nearly 10 000 rand for my tv. I called head office again today on 3 occasions and was told that a supervisor by the name of Ruben will call me back. I am still waiting and the head office is now closed. Needless to say in future I will definitely put hisence on the lower end of my brands of choice. I dont know what to do and no one seems to care