FNB unauthorized debit orders

For the past months I have been struggling with unauthorized debit orders. Every single month I have to report unauthorized debit orders with FNB and they constantly want to charge me for each account they block. Which doesn't help because every month a different company makes a debit order. I keep having to lose money because FNB clearly isn't protecting our data. I don't understand why am I not asked to approve debit orders with the bank first instead of having companies I know nothing about take my money every month.

Please assist me