MTN still can't handle a simple allocation of payment

This is my second complaint lodged on Hello Peter regarding MTN's pathetic handling of a payment allocation. I made payment on my accountn via EFT on 01/04/2021 as I stopped the debit order on the old bank account as I had requested MTN to debit my new bank account. I was advise that the debit order may still run of the old bank account. To ensure I meet my obligation the EFT payment was made. I phoned the MTN contract call centre after having my lone suspended. I was advised that MTN could not find my EFT payment which was referenced as I was told by an MTN agent, with my cell phone number linked to the contract. The next day I drew the proof of payment called the call centre to obtain an agent's direct email address to send the proof of payment, which I did, I received confirmation of receiot and a reference number REQ***. A few days later I received an sms from MTN stating that "someone accidentally paid into the account and thenpayment was being reversed back..." this reversal could not take place as it was an EFT payment and my old bank account was not credited. I sent an email to MTN stating it was not an error and that I require confirmation of the allocation. I still have had no response to this request. After midnight on 24/04/2021 I received an sms stating payment had not been received and the line would be suspended. It also stated a value higher than the monthly payment amount was due. Both of the points of the sms are incorrect. This disruption of service could cost dearly on new customer contracts on our side which is unacceptable. How hard can it be to allocate a payment? I am very disgruntled and at the end of my contract you can count on a lost client and I will be sure to tell many of the shocking handling of this and other complaints I and my family members have had with MTN which have been poorly handled overall. I will infact already start looking to take 2 of my other MTN numbers over to another network thanks to this. Sort this out ASAP. I am tired of MTN messing me around.