FNB can not control unauthorized debit orders

FNB is supposed to be a big reputable Bank yet they can not control unauthorized debit orders. I have debit orders of 90+ coming out of my account every month. I try and stop it however these people come in different names. I'm just going to switch to another bank because if I count the money I have lost so far it's just a lot. They need to control this. No debit order should come out of the account if it's not authorized . So those of you who wants to join FNB, think twice. I have really had it!!!!