Shocking service from Hisense

I tried to get servicefor my Hisense TV that is still under warranty. After trying to phone the service centre and getting no reply I sent an email. Again no response. After a second email and and threatening to contact Hello Peter I received a reply.I was asked to provide proof of purchase although I had supp**** their registration number that I was given when I registered the TV with them. After 2 days I got a job number. Eventualy 1 week later a "technician" ( I use the word with tongue in cheek) came fiddled around the settings and said that there ws nothing wrong. Needless to say the picture is even worse. I do not know how Hisense can use service agents ike these. I am now ging to try taking thr TV to tyhe Hisense center in Milnerton to seek advice. I only hope that at least someone there can help.