Mtn debit order

I never had a problem with MTN and my debit order. Lately, no debit order is going off my account and I have to pay manually. When I phone they need to create a debit order (AND WITH A WRONG DATE!!) I am disgusted and nobody seems to be able to help. Then MTN have the damn cheek to tell me my account is in arrears. I have had it with them. I send a mail on 02/12/2022 and got a reference number but nothing further. This is not how you treat a customer who is with MTN for 24 years. I am changing service provides for sure!!!