Services suspended due to unallocated payment made in April

I made payment to statement dated 12-04-2024 on my private account (due 03- 05-2024) on 24-04-2024 for the amount of 1060.96 using the exact same reference number I have been using for years. I phoned numerous parties and sent numerous emails with the proof of payment attached, but no response from MTN. Upon phoning, they say that it will be attended to and the ticket has been logged. MTN did not notify me that the payment I had already paid is outstanding, they just switched off my lines. Upon discovering this on 13-05-2024 and phoning, they turned it back on when I sent the proof of payment, but the payment has still not been allocated to my account and is showing overdue. On 11/06/2024 I discovered that they suspended my services once again and forced me to do a payment arrangement and that I need to settle my account on 24/06/2024 in order to have my services reinstated. They confirmed that they have received the payment 24/04/2024 but it has unfortunately been allocated to the old system and they are not sure when it will be allocated by the Eppix team, who can not be reached telephonically.