Continuous Unauthorized Debit Orders

I'm getting really fed up with Capitec Bank. In October Old Mutual debited my account with over R200, I tried to reverse the debit order via the app and called the call centre and was informed I need to go into the branch as it was over R200. Which was a huge inconvenience on my part but I did. And also asked that Old Mutual be blocked from any further debits on my account as I don't owe them anything anymore. End of November they debited my account AGAIN with almost R480 x 2. So I now I need to go into the back AGAIN to have this reversed? For me that's utter nonsense. Is this what I need to do every single month? Should I just change banks rather? Cause I really dont have the time to go to the bank every single month to go reverse unauthorized debit orders. I need these 2 debit orders reversed.