waiting for a refund for over 1 year now

IM ON CONTRACT IN 2015 I STOPPED USING A BLACK BERRY PHONE UPGRADED TO A NOKIA PHONE,VODACOME STILL CONTINUED CHARGING ME FOR BIS SERVICES. I DO NOT NEED BIS IF IM USING A NOKIA PHONE! I CALLED VODOCOM WITH MOST INCOMPETANT VODACOM CALL CENTRE CONSULTANT IN THE WORLD I WAS DEALING WITH SAMANTHA WEIDA,COLLEN VAN WYK AND VICKY DYANTYI WITH THEIR USELESS TEAM LEADERS DANESH.I WAS PROMISED MY QUERY WILL BE RESOLVED BY THE 19/07/2017....I HAVE BEEN DEALING WITH THIS OVER A YEAR NOW I EVEN WENT TO A VODACOM STORE IN CENTURION MALL TO QUERY THIS NOTHING IS IS BEING DONE PROPERLY.WHEN I DID A FOLLOW UP LAST NIGHT I WAS TOLD MY REFUND FOR R170.00 WAS PAID BACK TO ME...HALLO I WAS BILLED R65.00 MONTHLY FOR BIS FOR OVER 2 YEARS NOW I CANT NOT ACCEPT R170.00 AS MY REFUND ACCORDING TO MY CALCULATIONS I AM EXPECTING +-R1500 REFUND I ASKED FOR YOU OMBUDSMAN OFFICE CONTACT DETAILS NO IS WILLING TO ASSIST.