UNAUTHORISED TRANSACTION

This is like the 2nd month that a payment goes off in my accounts that I don’t know what it’s for I have reported it as ***** but I keep getting debited a whole R280 that I don’t know , ITS IS NOT SAFE TO BANK WITH FNB IM ALREADY UNEMPLOYED I CANT AFFORD MY BANK FEES HOW ARE THEY LETTING THIS THESE *****S GO IN AND OUT OF MY ACCOUNT WHEN I HAVE CLEARLY STATED I DONT KNOW ANYTHING ABOUT TGAT DEBIT STOP IT CANCEL IT SND THE STILL EVEN CHARGE NE FOR UNPAID MEGATAPE WHAT MUST HAPPEN