Unprofessional consultant

I called MultiChoice to update my banking details for my debit order. The consultant who updated the details did not tell me that the debit order will still be processed from the other account as it was after the 7th of the month which is the debit order cut-off date. Then they debited my old account which was not having sufficient funds therefore the debit order bounced, and the bank charged me an amount of R89.00 as a penalty for the debit order which did not go through. In my opinion the consultant should have told me about the cutoff date when one is updating their banking details as not all of us know about this.