ACCOUNT DEBITED TWICE, BAD ATTITUDE FRM CONSULTANT

I bank with Nedbank and my account was debited twice because of some *********** employee there. I had to call 5times before I was assisted only to be told that the refund will only be done in 10 working days which was on the 31 January 2015, on the 03 February 2015, only to be told no complaint was lodged and reference number given is incorrect. A consultant by the name of Lecona Mitchell informs me that my banking was given by another client that is why my account was debited. How secure is your BANK? <br> I have received no help from any of the consultants, all are rude and unhelpful. <br>