TAKING MONEY WITHOUT MY PERMISSION

I OPENED AN FNB ACCOUNT AND THIS MONTH WAS THE FIRST TIME MONEY WAS PAID INTO THE ACCOUNT SO YESTERDAY I RECEIVED AN SMS THAT THERE WAS R2500 TRANSFERED OUT OF MY ACCOUNT INTO A LOAN ACCOUNT ( I DONT NOT KNOW ANYTHING REGARDING THIS) SO I PHONED FNB YESTERDAY 5 TIMES TO FIND OUT WHAT IS GOING ON AND EVERY TIME THEY TRANSFER ME TO THE LEGAL DEPARTMENT AND THEN THE VOICE PROMPT LADY SAYS THAT THE EXTENSION IS INVALID THE NUMBER THAT THEY GAVE ME IS ALSO INVALID. I NEVER GAVE ANY PERMISSION OR GOT ANY CALL FROM ANYONE ONE TO ADVISE THAT THEY WILL BE TAKING MONEY FROM ME FOR A LOAN THAT WAS DONE 4 YEARS AGO (PAST 3 YEARS I HEARD NOTHING FROM THEM REGARDING THIS) I HAVE BEEN TRYING TO CALL THEM AGAIN TODAY 3 TIMES AND THE SAME PROBLEM I CAN NOT GET HOLD OF ANYONE THAT CAN ASSIST ME TO GET MY MONEY BACK THAT THEY TOOK WITHOUT GETTING ANY PERMISSION FROM ME. I WANT A CALL FROM ONE OF THEM TODAY AND MY MONEY BACK OR I WILL TAKE THIS FURTHER. THE REASON WHY I WENT OVER TO FNB IS BECAUSE I HEARD THAT IT WAS THE BEST BANK BUT I REGRET IT SO MUCH THAT I EVER WASTED MY TIME. I WANT A CALL TODAY AND MY MONEY BACK SO THAT I CAN FEED MY CHILD. VERY ****ED OFF