Worst service from MTN and ILULA Systems

I am getting the worst service from MTN SA. My line was suspended on the 4th Sep 20, yet I am not owing. I have tried to get it reactivated through their service champions, with no luck. I unfortunately lost/misplaced my sim card the next day. On Monday I visited The Glen MTN shops to get a sim swap and was told that my number has been hard locked, even though the system shows that I do not owe. Actual there is a R100+ credit due to me. We called Customer Services from the shop, still this issued could not be resolved and I was told that the issue was escalated to ILULA Services and I need to wait for an hour. An hour later I was back and nothing. Later in the day, I went to Rosebank MTN shop. The same thing happened, different service champion, same escalation, no feedback from the initial escalation, which had a reference number, only this time I was told to wait 24 hours. On Tuesday 8th Sep, I went to Melrose Arch, and after spending 2 hours again, I got the same response. It does seem like the MTN SERVICE CHAMPIONS and the ILULA technicians do not have a clue what they are doing and simply just do not care. I don’t even want to talk about their twitter service. It is just a waste of time. MTN created this problem and I am the one running around to get answers. This is appalling. I have been so inconvenienced such that I cannot perform some transactions since I need SMS verification codes from this number. I have been with MTN for 20 years + and I must say, I am done. I still feel cancelling the contract should not be the only resolution to this, does anyone have any suggestions on how to escalate this further?