Hisense smart tv

I purchased a smart tv during the month of May 2019, during the month of November 2019 the tv was no longer going on book the TV and it was taken in for repairs on th 27th of November, when the TV came back it could now go on but now the screen was flashing, had to log a new call to have the tv for another repair, only to be given the run around by Hisense not taking responsibility and blaming the middle man(the contracted repairs company) it almost 2 months and I have not had a proper TV since November 2019. I now have to wait another week until the middle man calls me to take in the TV. My question is when they took my tv in the 1st time for repairs did they not test the unit before they shipped it back to the customer? Ridiculous customer service.