Fnb unauthorized debits

Unauthorized debit orders on my account to the value of R1900,i have visited fnb branches and was denied entry because they cannot do anything about debit orders above R200,i desperately went to another branch and i was told the best that they can be done for me is to fill a dispute form,with no promise of stoping or reversing all the unauthorised debit orders and i was shown the door.i again today got another debit order called customer care and no care was shown.i am on my way to close my fnb account and would like to warn others against fnb.they do not have my financial security at hear***** very painful to loose hard earned money and to top it all your own bank cannot assist.please wise up fellow South Africans