ABSA FAILED TO REVERSE AN ONLINE TRANSACTION INSTEAD THEY TOOK MORE

MY NANE IS MZWAKHE MAGNIFICENT MTHIMUNYE. I HAVE A PROBLEM WITH ABSA BANK AN UNAUTHORISED TRANSACTION OF R580.89 ON 12-07-2018AND I WAS LEFT WITH R91.37 TOOK PLACE ON MY SAVINGS ACCOUNT AND I IMMEDIATELY CALL THEIR CALL CENTRE ( ********** 557) REF: ********** TO CANCEL THE TRANSACTION /REVERSE AND THEY TOLD ME THEY WILL DO SO BUT TILL DATE MY ACCOUNT IS LEFT WITH R120 AVAILABLE BALANCE MEANING THEY HAVE CHARGED ME R551 TO CANCEL A TRANSACTION ...BEEN ****** DAILY LIGHT