Getting charged for AirG service not signed up for

I'm getting charged R7 per week for the \AirG"service that I never explicitly signed up for. <br> <br> - The unsubscribe link provided in the weekly AirG SMS did not work and no contact details for AirG was provided<br> - Sending the message \""STOP ALL\"" to 30333 on 7 April 2015 also did not stop this WASP subscription<br> <br> I finally managed to get the subscription cancelled today after an hour long call with Vodacom.<br> <br> Besides wasting my time the past few months trying to sort this out"