REPAIR SERVICE FOR HISENSE SUCKS I WILL NEVER BUY AGAIN

I bought a Hisense 40" TV 2018 @OK stores,it was mounted on the wall,never fell,scratched .It still has the sticky plastics on it & surge protector.Then all of a sudden it just died,the blue light is till on but doesn't respond to button or remote.Went back to OK they told me guarantee has expired i should call the manufacturer.i called Hisense & was told someone will come.2weeks later still waiting & no feedback still have a Ecco 32" TV bought 2012 still function & have downgraded to that yet i have a higher grade TV,i was about to buy a fridge but opted for a different brand because Hisense service sucks,they could just tell me i should find an alley mechanic cos they would never fix the one i have maybe because i bought it cash and they don't deal with cash clients and somehow their 4 year warranty doesn't work?i have exchanged emails with a Boitumelo,i sent receipts,purchasing details and everything that they require but i think they are just stone-walling me to wait for an unknown time while i use an old tv