Unauthorized Debit orders

I am so disappointed with FNB, they forever just allow debits to go off accounts and charge me for the debits that I know nothing about, first it was handswork then I had to reverse and block, now it’s two which say EDO debit attempt, I know nothing about these, can this possibly stop because am starting to feel like my money can’t be safe with FNB, we work hard for our money, these unauthorized debit orders can’t just keep going off without my permission. This is unacceptable, can this be sorted please before I move banks...