Pathetic service from Hisense....

I bought a Hisense Smart Tv in 05/2018. I was really impressed with the TV and because it was a South African product. In April 2019 my TV just disconnected from Wifi and the Internet and would not connected anymore. I have phoned the Hisense customer care probably 10 times already and I have not been able to get any service out of them that would help me solve the problem. Their consultants have promised me software updates would be send to me, they would call me back etc. EMPTY PROMISES every time !!!!!!!!! I have up to date not recieved an software update or a call back. Their service are really pathetic......