Makro / Hisense POOR POOR POOR

I had purchased a Hisense 58” UHD LED TV from Makro on 28/08/2019. The TV was malfunctioning on 04/01/2021. We called in on 05/01/2021and was told that an authorised agent would call me back, but nobody had called and I had to call back to get feedback. Master Audio Visual picked up the TV on the 08/01/2021. They had not tested the TV at all… just unmounted it from the wall and took it away. Not explaining to us what the issue was. I have been trying to contact them since the 11/01/2021 to find out the status on my TV but their telephone number *** does not go through. When I contacted the Hisense service centre and they informed me that my LED Backlight was replaced and they will deliver the TV by Friday 15/01/2021. I have contacted the Hisense service centre numerous times today, 18/01/2021 and they also could not get a hold of the repair agents!! Nobody can tell me where my TV is! The Credibility of the repair company is questionable! What are they doing to my TV?

Based on the above, I need this to be resolved as soon as possible and considering what has conspired I am not prepared to accept the TV back. I would like to know the what the resolution to this issue will be.