Vodacom AirG service ******** billing

Like many, I have been billed and am repeatedly receiving the following message<br> Your recurring R7.00 Subscription to AirG Social Service will be billed on 2015-12-01. To unsubscribe click [URL Removed] :)<br> The unsubscribe link merely takes me to the website... This is ridiculous!! We've called and been told that they have removed me off the list but I am still getting billed! Very unhappy!! <br> Please remove this immediately!!!