Scheduled Fee Date

A couple of months back I went to FNB Centurion to ask them to change the date they deduct their service fee because I get my salary at the end of the month and they were deducting on the 25th. The consultant I spoke to, David, ensured me that this won't happen again and that FNB would only take money before the time if funds were available. Until today they still deduct their service fees before the time and thus leaving my account in the minuses. This is also causing me to loose rewards on my eBucks and will also cause me not to qualify for loans. I am not willing to waste my time and petrol to go into their branch again as they do not honor my requests.