TV not what we expected

We ordered a smart TV online from Game (order number ***), and it was delivered on 17 Jan 2022. In the manual (which was inside the box!) there was a loose paper stating that DSTV now was not supported. We ordered a smart TV solely to watch DSTV now and Netflix. We packed everything back in the box, and contacted Game on 18 Jan 2022, and said that we wanted to exchange the TV for one that would suit all our needs, even if we have to pay in for a more expensive model. To our surprise, Game is not supportive at all, they have a problem with the fact that we opened the box. There was no way that we could know that we could not use the TV for DSTV now without opening the box. They promised to call us back the same day, needless to say, empty promises. We called 3 times and every time it is just another empty promise. I never expected this bad service from Game.