MTN poor service when allocating a payment to your account

I've struggeling since July 2020 to get a payment allocated. I've emailed the pop to the Mtn branch in BFN numerous times. Just to get the reaponse it's sorted. I've decided this month to send the proof that the debit orders taken off since July is exactly the same and no deduction for this payment. To only get a case number last week and to get another request for pop yesterday and new case number. Very disappointed with Mtn.