Debit order disaster

For months now we have been experiencing the problem with telkom and their debiting. The debit order goes off but our service still gets cut and we have to call in and query only to get told the bill was not paid (even though we have a reference for the debit and everything).

The last straw was when we were told the account had gone to collections, even though the account has been paid every month. And now we have to wait 7-14 business days for our service to be turned on ( even though an additional manual payment has been made). And every month you have to pay the full amount when you only had service for half the month.