Charged for item that I did not subscribe to

I noted an item on my statement ' Mobile content fee' that I was being charged for on a monthly basis. <br> <br> I called the customer query line and was told that I need to call ***(Jet and Edgars airtime line) in order to cancel the subscription ( To which I had never subscribed). I was given a call reference number and was told that they would call me back within 48 hours to deal with my query. They did not call me back so I called them back as well as the initial edgars customer query line numerous times to try to sort it out. <br> <br> I have now been told that the subscription has been cancelled but they have still not reversed the charges. <br> <br> <br>