AirG Social subscription

Today I received a sms stating that a R7 AirG Social Subscription will be deducted from my account. A subscription I didn't ask for. I phoned the help desk where the person advised me to unsubscribe on Vodafone Live. On my Vodafone account I could not find any active subscriptions. Last week I received the same message and R7 was deducted from my account. What must I do to unsubscribe from AirG. The next R7 will be deducted on the 20th and I would like to sort this out before then.