Pathetic Mobile Network Ever

I was handed over to the lawyers for non payment as someone took a contract phone on my name and never paid. I then decided to settle MTN and their lawyers the outstanding amount of R 16 049,00 in January 2024. I received a paid-up letter from their lawyers and on MTN system it shows that I have paid in full but my account is still sitting with legal and they refuse to give me my number back. This has been my struggle for the past six (6) months. I've sent thousand emails to MTN legal, called their 083 135 and *** number, I even went to their offices but still the matter is not resolved, My credit has been badly affected due to this and I'm losing business as some of my clients can't get hold of me as MTN is constantly refusing to give me my number back, I'm now frustrated, lost a whole lot of revenue and as a result helpless. I don't know what to do anymore.