Trying to get assistance with my refund

My name is Diana Getrude Mazibuko *** 087. Am struggling to get assistance with getting a refund from Vodacom accounts Department. I was given an extra sim card of flexi R50 which I was not told off and I cancelled on the 20th of March 2015. I suppose to be paid from July 2014 until March 2015 as they were deducting money from my account.<br> <br> Can I be assisted please. Vodacom is worse am very unhappy.<br> <br>