UNAUTHORISED DEBITS

I am mortified that I am again a victim of these un authorised debits. I have checked my account from as far back as March this year I have been debited with amounts of R99 or R98 by companies I have never authorised. This month it even caused my account to go into negative and FNB charged dishonour fees. I the debits come from Eennasie, Sage wise, Mutual Direct, J&A Soluti... I get three of these collections a month. FNB I am now contemplating on closing my accounts with you as I cannot deal with my account being compromised like this. Please help urgently and further reverse the charges for the dishonoured debits.