Capitec Allowing ******** to Take My Money

I am highly dissatisfied with Capitec bank. after years of great service now this. I have been getting unauthorised debit orders come off my account from these companies who claim that they have authorisation from a third party to debit my account as they are a billing company. on the 27/07/2015 this happened and an amount of R99 was debited and then again on the 03/08/2015 an amount of R89 has been debited.when i call my bank to tell them that this is happening i am told that i can dispute this at a charge of R20 plus the bank charges incurred for the unauthorised debit. i use my account as a savings account and never give it to anybody fro debit orders so for this to happen 2ce in a row while i incur charges for ********* *****ing what little money i have. surely as my bank you should be preventing this from happening. especially on savings accounts. i am very unhappy and i REFUSE to pay the bank charge of R20 to have this reversed for a second time. it is not right that i have to be ****med then still be charged to get ****med. i demand a solution to this foolery immediately,