Very bad Service

My Hisense smart TV started to have double vision on the screen. I called the call center to report the TV was faulty. They sent me a job number and sent someone to collect the TV. It has been over 4 weeks and I have had no reply on what the process is I am just getting the runaround. What is very disappointing it is the second time this TV needs to be repaired for the same thing. I have decided never ever will I buy a Hisense product ever again. I have had no TV for the last month. when you get in contact with the service department they say we will call you back in ten min with an answer ,They never come back to you .