Debit ***** at Nedbank

I received a Sms telling me my debit order date for my personal loan has been changed for December (which they did without consulting me). I was told to contact the call centre if I wanted to opt out. I topped up on airtime called the useless call centre and was put on hold until my airtime ran out. This is just a **** so the debits will go unpaid and they can charge us outrageous fees for late payment. I can't believe they are even allowed to just change debit dates and amounts as they please. Nedbank is just a useless GREEDY bank.