Proper way is to go into your account then 'Edit your personal information or change your password'. Bottom left hand side is a button or check box can't remember which. Just click on it and an email will be sent to you. Verify the email and the account will be unsubbed with just the remaining time left on it.
I wasn't actually going to post this as you might take it the wrong way coming from me.
I wasn't actually going to post this as you might take it the wrong way coming from me.