unwanted subscription

<p>How do I possibly sign up for anything in my sleep?? Thats crazy! Got an sms at 01:43am stating Welcome to Super Harvest Frenzy! Billed ********** Playing at http://m.airg.ca/vodazashf Customer Care + ********** 7985.Unsubscribe http://live.vodafone.com/unsub" and when I click on the link to unsubscribe I get a warning saying that following the link I may leave my phone vulnerable and and that I am solely responsible for any damage or loss... What the hell is that about? I didn't subscribe to anything!! I Want this Removed!!</p>