Bad service

I bought a Hisense TV cash from ok furnitures hennenman branch, it started acting up last year in December 2021, I took it to the store and it got repaired within 2 weeks. Two months ago (May 2022) same thing happened, I asked the manager to arrange for the TV to be picked up from my home, 10 days went by and they didn't show up, I then hired a vehicle to take it to the store where I was told that they couldn't pick it up because they couldn't find my address which is odd because it was delivered by them. The manager by the name of Donald made me wait 2 hours to sign some form that confirms I left the TV with them for repairs. It has been 2 months since I took it for repairs, I have to call almost every day to get an update which is a futile exercise because the person who answers my calls always says she'll ask the manager and get back to me which she has never done, you can imagine my frustration because I want a new TV or at least be refunded because I'm worried as to how I will get it repaired should the problem persists after the warranty expires. I don't know who to talk to about this matter. I tried to google the contact information for their head office with no luck, I even left my number with the automated computer on messenger about two weeks ago but nothing and no one has helped me