Tv nightmare

i bought a sinotec tv in 2022 with a 2 year warranty. The tv was great until 2 months ago it switches off and no on its own. You will wait 10 to 15 minuted before it switches off.i logged a call to Marko polokwane to come collect it. 1 week later no word. I contect sinotec and lodged claim. A week later no collection so i contact them and some said story i must wait again. Its a ploy to get my warranty to fall off.i have written so may complains and emails but they are mum.be warned skyworth the pits