Absa doesn't know what the hell they are doing!

First Absa debits my account 2 weeks earlier than what was contractually agreed. Then they refund me after I complain. Then they don't debit my account on the agreed date, but rather send their collection agency after me. When I phone and put in all my information, I get asked again for the same information. There is nothing she can do, she will request a debit order. Why do I have to request now to be debited, yet you send your collection agency after me. Just debit the acount as was contractually agreed. Why is that so difficult! Also when I call it says I have two accounts, which I only have one, so who is the second account for? No one can tell me or help me. This has got to be the worst bank in existence. What a waste of my time for pure incompetence!