So very disappointing Hisense and Makro

Bought a TV from Makro early December 2023 – last weekend something happened, and the screen went black, then rainbow trips at times. I called Makro Monday the 22 July to asked them re my warrantee, they lady assisted me and unfortunately, I didn’t have the model and serial number with me at work, so the call was logged Monday, Tuesday I had to call and give them the model and serial number – I did that. They then said a technician will call to come to my house 3-5 days - we waited, Wednesday, Thursday, Friday, Saturday…..nothing. I called Makro call centre again Monday the 29th of July – the lady said the technician was supposed to go to my house Friday, and if he couldn’t make it, he was supposed to call and make a new appointment – that never happened, no one from Hisense called me -to this very second. She then said she will quickly follow-up and they will send me an email before end of business – yesterday. Up to now no one has emailed me, no one has called me, and I my very expensive TV is not working. Very disappointing from both, Makro and Hisense! So what I am supposed to do now – JUST WAIT??