MTN SUCK!!!

My ex-husband had a contract with MTN in my name and did not pay. I was therefore liable to pay the amount which consisted of interest as well as a cancellation fee. The account was handed over to attorneys and I made an arrangement to pay the amount off in installments of R400 per month. As the interest and fees being charged every month nearly covered the R400 being paid a friend lend me the amount of nearly R5800 to pay it off as a lump sum. With the arrangement that I pay her back every month. The attorneys send a letter to myself and MTN to say that the amount is now paid in full. This letter was send to MTN in August 2019. Now, almost a year later MTN is billing me again for this contract, which they should have cancelled. I have been to the local MTN store several times to get it sorted out as well as sending numerous emails to enquire about the statement they are sending. The only response I receive is a query number and nothing further. Today I visited the local MTN store again and after holding on the line for more than 15 minutes had to leave to return to work again. I called MTN and spoke to a consultant who transferred my call to the "Legal department", only to be told by the person who answered that it was not the legal department and I was transferred again to someone else. This person asked a whole bunch of security questions and I was told that 'MTN does not just cancel a contract' and that I am liable for the amount of over R1000, this is on a contract that should have been cancelled.