R14000 DATABILL THEY DON'T SEND MY ITIMISED BILLI

MY COMPANY, LETHU CORPORATE SOLUTIONS HAVE BEEN A CUSTOMER OF VODACOM FOR THE LAST 10 YEARS. IN SEPT/OCT/NOV 2015 I HAVE RECEIVED DATA BILLS WHICH AMOUNTS TO MORE THAN R14 000 WHICH THEY CLAIM WAS USED ON MY OWN CELL NR FOR DATA. EVERY MONTH WE RECEIVE OUR INVOICES & ITIMISED BILLING VIA EMAIL, BUT FUNNY ENOUGH FOR THE MONTH OF OCTOBER WHICH HAS A BILL OF MORE THAN R10 000 ALONE, I CANNOT SEEM TO GET MY ITIMISED BILLING. AFTER NUMEROUS CALLS, EMAILS, BEGGING AND PLEADING THEY KEEP SENDING ME THE SAME INVOICES AND IMTIMISED BILLING FOR SEPT AND NOV, BUT FOR SOME (VERY SUSPICIOUS) REASON THEY KEEP OMITTING THE OCTOBER ITIMISED REPORT FOR THE DATA I USED WHICH AMOUNTS TO MORE THAN R10 000. I GO ON FACEBOOK, WATCH MY EMAILS AND USE WHATSAPP, SO I WOULD LOVE TO KNOW WHAT DID I USE WHICH COSTS ME R10 000 IN DATA BILLS??? FOR THE 1ST TIME IN 10 YEARS I HAVE A BILL MORE THAN R4000/M FOR 5 CELLPHONE LINES, I CAN SCREAM FROM FRUSTRATION, IT IS NOT LIKE I CAN JUST REFUSE TO PAY, THEY WILL CUT MY LINES WHICH I CANNOT AFFORD IN MY BUSINESS. SHOULD I SEE AN ATTORNEY, HOW DO I TAKE ON A COMPANY LIKE VODACOM?