Pathetic Hisense

My tv broke and I registered a complaint, they came out 2 days later to confirm it broke, only collected tv after another 2 days. The tv was with them for 13 days to repair a backlight, when I complained about the time frame, was told I am only eligible to complain after 21 days. I sent an email to customer complaints, I wasn't even acknowledged. They returned my tv and it broke again after 3,5 days. Again it took 2 days to come to my house. The technician just stood there and looked at the tv, did nothing. Again I was told it will take 2 days to collect. I asked when can I get a credit note as everything in the tv was replaced 5 days ago, his answer was someone will get back to you in 2 weeks... .Pathetic!!!!!!!