Bad after sales service / passing the buck to no one in particular thereby taking no responsibility

Bought Hisense Smart TV. Connected it up and tried to connect from computer via Wifi. Worked once and then not again. Reported the problem to Hisense on 24 January 2018. After having a service provider out on site and after several follow up calls, it is now 14 February 2018 and the TV has yet to be repaired/swopped out - whatever! What really irritates me is that I received an SMS on 13 February 2018 informing me that the call is cleared as it has been repaired. The supervisor of customer support doesn't bother to return my calls.