Very unhappy customer

I have been accused by the Standard Bank Credit Card Rehabilitation and Recoveries team of being in arrears with my Credit card for the last 21 months. I have a debit order set up for the 25th of each month to deduct the minimum payment. They have taken their payments for a few months then afterwards debited my account whenever they felt like it. Mind you, I have other products with Standard Bank that always deduct money on the 25th of each month. The last debit order they initiated on the 4th of Sept, 10 days after the agreed date. I contacted them as they were emailing and sending me sms's. I commited to a payment that I would initiate myself this month but they handed me over to their lawyers. This is very unprofessional of them really as I've been a Standard Bank account holder for 18 years if not longer. If this is how they treat their customers then I would not want to bank with them anymore. They even mess up my cheque account passing amounts that was already debited and charging me R130 for insufficient funds. If you don't speak up their accounts people just do as they please. No one has ever called or messaged be to apologize for their mistakes ever. I am ready to move as soon as my debt is paid up.