Month after month there is some new mess up!!

I have yet had another mess up with ABSA. Every month it is new amounts being incorrectly debited. The wrong dates being debited. Money missing and they can't explain to me as to where it has disappeared to. This month for the second time might I add. I haven't received my ABSA rewards. They debited the subscription for the rewards. Yet I received nothing. I receive rewards every month as we swipe a lot for petrol. When I query it I get told one of my debit orders haven't gone off. All my debits have gone off. The last time this happened it took someone 3weeks to get back to me. I need a response asap I cant keep running after absa. I have a lot with absa. And I have spent a lot of money over the years. There is no loyalty here.