Unauthorised Debit Orders

For the past 2 months my bank account has been debited twice (R100 x 2), by Capital Computer Bureau. This has been done without my express authorisation, or written consent. I have been lucky that my bank managed to credit my account in both instances, after I brought it to my bank's attention. But the problem is that it will happen again next month, and until who knows when.<br> This is a complete ****, as I don't know Capital Computer Bureau, nor have I given any written consent to deduct R200 from my account every month. The weird thing is that the reference on my bank statement says it is for an insurance premium. I know all my insurance debit orders that gets deducted every month, and this is definitely not one of them. I'm wondering how many other honest people this is happening to every month. I'm not sure if my bank will be able to stop these charges before it hits my account in the future, but I will speak to them to find out.