99 Debit orders that are not Authorised

I am very frustrated about this whole thing of debit orders going off my account with the amount of R99 - R199 every month and when i called in the Consuntant has the Audecity to tell me that 'but sir you can reverse this on our banking app' now my primary consent is not that i can or can not reverse the debit order my consent is that it means our account are not safe because people have easy access to and they can easily debit our money without our consent, not so long people will be debting all our salary in our bank Accounts. Why is is that if you have a new Debit order you get an Sms saying 'there is a new debit order Lodged if you do not know anything about this please call this number ******?' why with this 99 is not possible? is the bank working with this people? is the bank trying to reap their customers off? does the bank staff know anything about this? is the bank trying to charge more bank charges unnessesarily? i sit and i ask myself this questions every day!!.. now imagine if you do not have suffient amount in your bank then they will charge you R8.50 for each unsuccesful debit order made as i type this i am sitting at 13x of R8.50 Totaling to R110.50 for this month only so this is the money that FNB will be getting for me just because my Bank can not protect me.