Unauthorised deductions on my FNB account.

I am extremely annoyed and frustrated that FNB allows transactions to go off my account which mean absolutely nothing. I have now had TWO instances where money has gone off my account with the description of #item not paid. etc etc. I have NO debit orders on my account so it cannot be for a bounced debit order or anything like that. And there is always funds in the account, so where can something not be paid? The first instance was for R150 and the second for R300. There is no feedback or response from their secure chat and bankers. It is extremely frustrating, especially when you do not have a clue what these amounts are for???? If i do not bring this up, then they will continue doing this, and imagine everyone decides to "just leave it", imagine how much money they must be making??? Its ridiculous and opportunistic!! I am seriously considering switching to another bank, as this constant non-responsive behaviour and unauthorised transaction are a real pain!!