Really Bad After Sales service

I am really disappointed in service that I am getting from contractor that is suppose to deliver a service and that are not even delivering any thing. I had a great service Roegshana at Hisense it self but now that is gone. The guys that was suppose to repair my one month old T.V was at my house on the 9th of October 2018 and had a look to see what the problem is, I was advised that the main board on the T.V is faulty and they need to replace it. The technician advised that the he will contact me the next morning to advise when they will be coming to do the repairs. I had not phone call from him, and at about 13:00 the 10th of October I contacted him, he advise that they do not have a board in stock and will take 3 days to come up from Cape Town and then they will contact me. Up to this moment no one has contacted me to arrange the repairs. This really **** service and I feel for something that is only a month old and all ready have a main board that is faulty, can I trust any of Hisense products again, specially if you getting a service like this.