Angry customer

This is the second time I'm complaining about Standard Bank particularly the Vehicle Asset Finance. I completed my vehicle debt mid-December however today they tried to process a debit order onto my account. During the time I was still paying, Standard Bank debited the monthly instalments on the 25th and today it's the 14th yet they processing debit order in my account. The debit order was reversed and now I have I'm charged a fee of R61.00 for their error. When I called to speak to the consulted she told me I've failed the security test and therefore she can't assist me, meaning I have to go a branch (who has time for that? and the worst part it's during the week). I'm honestly not happy with this bank and how they operate. I'm definitely changing it.