********** Debit orders

I am really disappointed in FNB Bank debit order reversal. On 30 May 2020, I noticed ********** debit orders coming off my account and I reversed them thinking that its gone and dusted. In June 2020 more ********** debit orders went through my FNB account totalling to over R3000. Early June 2020, I reported incident to FNB and they said to me they are not going to do anything because the debit orders did not go through again after the last time. Since mid June, more debit orders have gone through the account and am now overdrawn. Is really frustrating talking to *********** FNB consultants who think you don't know anything and they are clever. I am really sick and tired of this bank and now considering moving to another bank.