MTN unable to fix an incorrect ID number

Having tried unsuccessfully to get my ID number corrected on my MTN account, I am now appealing to Hellopeter! I have had a 3 month runaround! Customer care wants a copy of my ID. It’s not clear enough. I resend. They want it in a different format. Then they can’t do anything. I must go to a Branch. Branch says they have updated but I must wait 2 hours for the main system to update. It doesn’t update. Back to Customer Care. Back to a different branch. The field is greyed out. They can’t do it. I need to change my Banking details. My husband Passed Away. His account is about to be closed. If the payment bounces I risk being Blacklisted. I have requested that the account be changed to PAYG as this was my husband’s phone. Only an automated response. Second attempt I was called back - once! Missed the call! Help!