DOUBLE ATM TRANSACTIONS

This is now the 3rd month in a row that I have had double ATM transactions going off of my account. The previous two months, the money was reversed. Now again I see I drew R600 on the 27/07/2015 and it has been deducted twice off my bank account. Really!!! What is going on, it is now the 29/07 and it still has not been rectified. Does this mean each day I need to go through my bank account and make sure that my money isn't taken? Then go to the bank each time to get it returned - this is not the service I thought I would get from Nedbank.