Unauthorized Subscription

Option 1: In the fine print of your accepting the initial "Free" issues, it would have stated soemthing to the affect of "after the trial free period is over you will be billed autamitcally at the acount provided, you can cancel before the trail subbscription period is over or call the number below at anytime." or something like that. Since you did purchase something and selected the other trial or "Free" you provided them with your bank account information already and when you approved the actual purchase of the item you wanted, they were legally able to use that for the future charge as well. "Always read all the details and fine prints"

Option 2: You had your identity and account info stolen and someone else made the purchase.