MTN customer care service

I called MTN last week requesting to change my account number where they debit the monthly contract money. Now on the phone the lady mentioned that I should wait till month end before I can change the account details. Then I told her that I will not be using the account number that they debit from and that's when she said she will assist with the changing of the account number and she did so. Now she said to me that the money will NOT be debited from the NEW account and that I should pay at the store..now on the 31 July 2023. I went to the MTN store in Sandton where I paid the contract phone in store. Now later that evening MTN debits the money from the NEW account. So I decided that I should call the customer care service so I can be assisted with the matter. I have been holding for almost an hour and no Consultant has been allocated to my call. I want my money