taking my airtime for an unknown subscription

Good Morning Peter<br> <br> For the past 3 months Ive realised my airtime and data bundles were depleting rather very quickly than usual. I called my network provider to investigate and established that my number has been subscribed for some service with a company called Smart call technology services. Vodacom didn't have their contact details on their data base so they said I should google them. I call and spoke to their customer service agent, who advised my number has been subscribed for competitions, but she couldn't explain to me where I subscribed or what product or competitions this was seeing I am not even into competitions and staff. So I asked her for their customer care line which when I call routed me back to her. This is seekening considering I am paying close to R1000 for my contract every month and I don't use those services coz I am unknowingly subscribed to some bogus service @ R7 a day for absolutely nothing. I would like for this company to refund me all my monies taken to date andI am intending going the legal route.