Unauthorised debit order

there is a debit order of R99 coming out of my account monthly since February 2015.i went to Capitec branch Wadeville in July to inquire about .They only reversed the June debit order at a cost of R20....meaning i lost R394(because of their 40day rule ).Just when i thought they stopped the debit order again R99 dissapperd .I went back to the bank to reverse it and i was charged further R20.The consultant who help me told me the debit order cannot be stopped .....is my money really safe ? in total i have lost (R394+40=434 ) to date