MTN Client Call Centre and Headoffice: No Service/Communication at all

I phone MTN client centre last week because I received a SMS stating that I am R500 in arrears. I cannot be in arrears because they debit my account every month. The call agent came back and said that it is an error and I must ignore it. I now wanted to do a sim swap on the 26 January. They refuse to assist me unless I pay the “outstanding” amount. I have never been so humiliated in my life. I have never not payed my debt in any way or form. I phoned, send a mail and a messenger for it to be sorted. Nobody came back to me. Then they suspend my account yesterday. Had to pay R300 just to get it on again (even thu that non is my fault). Said it would take 2 - 12 hours to come on. WiFi never came on. THEY SUSPEND MY ACCOUNT AGAIN THIS MORNING! No client service at all! I want to pull my hair out! HELP! NS: the only angel in the whole story is Georgina at MTN Somerset Mall at is doing everything possible to assist me but she also need their head office to come to the party.