Contract without consent

In 2010 I received a call from a RMCS agent. Who gave me a airtime-top-up contract.<br> But when it expired /lapsed, they renewed it without my consent. To date, every time I experience problems with the number and contact Vodacom, I get referred back to them. I have called them on several occasions, one time I even held on for more than twenty minutes, until my airtime finished. <br> Now I can't access my emails, and again I've been told to contact RMCS. All I want is for them to give me back my number.<br> <br>