Unauthorized debit order

I changed accounts on 14/10.2015 and was asked to fax a letter with banking details and I did that, I was then asked to pay the monthly Bond for 25/11/2015 cash as their system will only start debiting my account in December and I did that on 25/11/2015,On the 29/11/2015 a debit order went through. I went to ask them to return my money but they said they wanted me to fax my proof of Banking details, I mean how could you debit my account and then later ask me to send proof.. STANDARD BANK is so useless i'm now planning to move my Bond to another Bank such as FNB maybe it will be less paper work than this *********** Bank called STANDARD BANK.