******** debit orders

FNB has a problem with ******** debit orders going off customers' accounts. It is so bad that I am now holding on for 30 minutes to try and sort out a debit order of almost R3000 that went off my account but they are busy the whole time. I also had four small amount debit orders that went off; and I reversed them and stopped them; but they went off a second time this month. It's amazing??? I am a business owner and I want to warn potential customers to think carefully before you choose FNB. Because now I am stuck with FNB and I am not getting the help I need.