MTN legal department unresponsive

4 Years ago I had a contract with MTN, which was paid via debit order. On Saturday 30 July 2022 I went to MTN in Walmer Park, Port Elizabeth to open a new contract. On Tuesday 2 August 2022 I was told that my application had been declined as I had been handed over to their legal team. I checked my credit score and see that I have an amount of R9.00 owing to MTN. Since Tuesday I have spoken to over 10 MTN customer care agents and have been to 2 MTN stores. None of these agents have been able find this alleged R9.00 that is allegedly owing to MTN. None of these agents can assist me on their "old" system. I have e-mailed the Legal department and get absolutely no response. I am unable to open a new contract and I am unable to port my number to another service provider. Reference number: ***