BAD SERVICE - DEBIT ORDER DATE NOT CHANGED TWICE

My name is Sean Williams. I have 3 policies with old mutual and I called the call centre two months ago to change my debit order from the 20th to last day of the month. Last month my debit order still went off on the 20th after I called to have it changed and I was advised that they will change it again. Yesterday I was debited again and my debit order date is still not changed. I called the call centre and spoke to Melissa Scholtz who advised that she cannot change it now because they can only make changes after the 3rd of the new month. My concern now is that it wont be done and I will be debited again next month on incorrect date.<br> My debit order came back unpaid 2 months in a row and it is affecting my credit record and I am being charged banking fees for unpaid debits which is not my fault. I would like a manager to call me because I am very unhappy with the serv I have received from Old Mutual. I would like a letter from old mutual which I can send to my bank stating that I was debited in error and I would like Old mutual to take responsibility for the bank charges due to the unpaid debits.I would also like the 2 previous consultants to be reprimanded for not doing their job