messed up merchandise

On the 23.12.2018 I bought a HISENSE 40 FULL LED TV at Makro Motague Gardens. I called Makro to advise them that I have a problem with the tv on 22.01.2019. I received a vist from Clint a technician that came to assess the tv. He advised that he will send a report to makro and they will provide feedback to us. I received no feedback and when I enquired was told Clint did not send in a report. I was only advised by Makro in Feb the unit have a crack in it now. The problem initially was that there a black dot on the tv . I have not heard from Makro until today about the progress and I totally disappointed in the service. I need my tv fixed or replaced asap. I paid for a tv that makro is sitting with and i am totally upset that I have to suffer for their incompetence and iferior products. I am giving you an opportunity to provide feedback and replace my tv before I take the matter to the media