HELP! MARKED DECEASED BY MTN SOUTH AFRICA!!

After my husband passing away in May 2022. I went to MTN PMB at Liberty where I spoke to Mark the manager to close the account after submitting all the relevant document. While trying to take up an additional MTN contract in June 2023, I was informed at the same branch mentioned above that I have been marked deceased on credit bureaux so I can’t take a new contract. I have contacted lawyer and paid money to assist only to be advised that the error is on the side of MTN South Africa and only them could sort this mess out. I’ve visited the liberty mall branch as well as the Gateway mall branch on several occasions since last year with no finality to the problem. I was only informed that reminders and escalations of the complaint is being forwarded to relevant offices. I have attached all required documentations still with no resolution I was given a Remedy number:*** used in all their correspondence.