Absa personal loan

I recently increase my ABSA loan, and on that day I told the person who helped me that my debit order must go off on the 25 of each month, that is the day I am getting my salary. The first month I receive a sms on the 23 of the month saying that I need to debit my account for my debit order from ABSA. I phone them the same day and the guy who helped me said it is the lady who helped me who made a mistake,and it is to late to rectify it now. He can only change it for the next month. It is still not sorted after I phone them how many times, and now it is extra bankcosts on my account which i need ABSA to return the money to me,since i feel it is their fault