UPGRADED CONTRACT WITHOUT CONSENT

WHEN I INQUIRED AT VODACOM WHY THERE IS STILL A R109.00 GOING OFF MY ACCOUNT I WAS INFORMED THAT MY CONTRACT WITH VODACOM WAS UPGRADED AT CHATZ WESTGATE BY A GUY CALLED GRAEME. PROBLEM BEING THAT I DID NOT UPGRADE MY ACCOUNT AT ALL, I HAVE REQUESTED CANCELATION ON THIS ACCOUNT NUMEROUS TIMES VIA THE WEBSITE AND EMAILS WITH NO REPLY. I LIVE IN CAPE TOWN - HAVE NEVER BEEN TO WESTGATE OR JHB. I PHONED CHATZ WESTGATE AND A GUY NAMED SHAUN CONFIRMED THAT THIS WAS DONE WITHOUT MY CONSENT AND THEY WILL ARRANGE REVERSAL AND BACK PAYMENT. NOW I HAVE TRIED CANCELING THIS WITH THE CANCELATION CALL CENTRE BUT NO LUCK. THEY KEEP CUTTING ME OFF OR PUTTING ME THROUGH TO THE NEXT PERSON.