call centre unable to help

Hi.<br> <br> I've just seen 4 unauthorised debit orders on my cheque account and have made 3 calls to your call centre - and it seems that this is unable to be resolved. In the absence of an email service channel - I'm resorting to Hello Peter for assistance as I don't have time for more calls. Every month an amount of R175 is debited, except in Oct it occurred 5 times. One of the agents (Roshnee) was able to reverse 3 of those and transferred me to the ***** department who was unable to assist. Please can those debits be stopped immediately and someone advise on email how this was authorised to occur.