Hisense do not care about their customers keep away from this product

My Sony TV had a power surge and the insurance replaced it in 28/02/2019 with a Hisense TV. I had had it for about 6 months when it would keep switching itself off. the people whom we got it off fixed it. Now 2 weeks ago the same thing has happened again I called the people I got it from said it only had a one year warranty I phoned Hisense and they said it had a 4 year warranty and they would send someone out to fix it still no one has contacted me or come out to fix it. I live on my own as my husband of 43 years literaly dropped down dead because of a clot in his lung and I have to go into Hospital for a procedure I have explained everything to them do you think they care I phone everyday and they just say our technicians will phone you that is over 2 weeks ago. I feel that for a TV to break down like this and they don't seem to come out very quickly they should in all fairness replace the TV. so heaven only knows when they will get around to fix it please take my advice AND KEEP AWAY FROM HISENSE THEY DO NOT CARE ABOUT THEIR CUSTOMERS AND TERRIBLE SERVICE.