Complaint about ********** debit orders on bank ac

It has happend on a few different occasions that ********** debit ordes have gone off on my bank account. On every occasion I have had to either go into the bank to reverse the debit orders or do it over the phone and they charge me for those reversals every time. Their only explanation is that they cant do anything about it because these ********** keep changing the reference number and name on the debit order and then it will still go off on my account. One of the places taking my money each time, we traced their number and they are situated in durban,I have never been in durban in my entire life.i just feel this is unacceptable and they have to put better security measures in place.i am now forced to close my bank account and do my banking somewhere else.