I'm done with telkom

I'm fed up with telkom. I took a phone contract at telkom Newcastle Mall KZN November 2020 and on the 1st of July my iPhone 11 Pro Max didn't pick up my sim card, so I went to the telkom store they did 5 simswaps it didn't help but if I put my sim card in a different phone it does work, so they booked my iPhone to get it fixed and it went away for 3 weeks it came back it wasn't fixed, they booked it the second time it went away for another 3 weeks it came back and they still didn't bother to fix it, so I just took all the things it came with the iPhone put it in the iPhone box and took it back to the store cause I don't want it anymore I'm terminating my contract cause I can't be paying R2000 every month plus insurance for a phone that doesn't work. Today they sent me an email saying they taking it for repairs for the 3rd time NO!! I DON'T WANT IT ANYMORE, IT'S EITHER THEY GIVE ME A NEW ONE OR I'M TERMINATING MY CONTRACT