Unauthorised debit orders every month

I have been with absa for more than 10 years now and i have to say it, i am not happy with the way they do things recently. It's the 5th month having unauthorised debit orders debited on my account. I have to go to the branch almost every month because i cannot reverse them via internet. The worst thing about this whole situation is that absa is charging me for this and my banking charges have escalated. I think that is why they not dealing with this because they benefitting from this whole ****. Am so fed up with them wish i didn't take home loan with them. This month i was debited R89 and i can't reverse it on through internet banking, need to go to the branch, that's petrol, time off work plus R65 they gonna charge for reversal. This is *******ion at its best and am sure they doing it to most of their clients, so you can imagine how much money they making out of this. Am moving my account to fnb. Am tired of this ****!