Cancellations of 2 contracts not done by MTN

I cancelled 2 contracts on the 11/07/23 with MTN, followed the cancellation process. Spoke to 3 MTN Champions. Followed up at MTN Springs Mall confirming both is cancelled. But the one guy told me one is not, one of the ladies told me both is cancelled. I followed up again to call MTN on the 1Sep23, I spoke to 7 people forwards and backwards to cancellations then to retentions and back to customer services. Retentions told me one is cancelled they will escalate it and will come back to me within 48hours. I requested a ref nr he told me they do not give ref nr's. I requested them to phone me back on another nr, i had to request from customer service to change the primary tel nr. I then spoke to them they requested a ref nr. Which I could not give them. I told her I have been on the phone over an hour and I beg her so that someone can assist me with these cancellations. The lady told me her supervisor will contact me back. Nobody phoned me back. On Saterday morning the 2nd Sep23 I went to MTN Nigel spoke to Sibongile and she told me both contracts is not cancelled. This is a battle to get 2 contracts cancelled, and MTN is not resolving this issue. I have to pay each month but they do not cancel the 2 contracts. This is bad service.