SHOCKING CUSTOMER SERVICE FOR HISENSE - SMART TV 58"

Absolute shocking customer service - Our Hisense TV 58" SMART TV (2 years old bought on Black Friday 2 years ago) just switched off on its own and we have been unable to switch it back on. Called and emailed receipt of purchase through to *** - acknowledge receipt of emails received with a ticket # being issued. Received an email last night to say the technician will call us today. Phoned them this morning to just get an estimated time of arrival to be told the technician is scheduled to come through today - not sure of the time but he will call when he is on his way. Phoned again this afternoon to be told NO technician has been assigned to us until Tuesday, 30th Nov. Shocking, absolutely shocking customer service from Hisense. Leaves a very bitter taste in my mouth that one consultant gives you a story in the morning and another consultant gives you a different story in the afternoon. Maybe the Manager over the Service department can give me an explanation.