Air G subscription

Hi,<br> <br> I apparently have a subscription to Air G which I have never heard of. I have never subscribed to this.<br> <br> How do I unsubscribe to this?<br> <br> I called customer care who told me that I have no subscriptions but yet I am still being billed for this.<br> <br> I got another SMS today saying: \Your recurring R7.00 Subscription to AIrG Social Service will be billed on 2015-04-27. To unsubscribe click link.<br> <br> How is it possible that I am subscribed to something I have never heard of?<br> <br> If there are any more deductions from my airtime I will have to take this much further than this as this is definitely ********.<br> <br> Please get rid of this "subscription\"".<br> <br> """