Only way is to email them and tell them that effective the date of your email... you no longer want to be subscribed to their service (or lack thereof). If they continue to chg you. Dispute with your bank and they will stop any further debits from your account

You have to send them an email, requesting that they stop your groovebook, I also went into my personal settings and where your credit card info is, push Update and erase all of your stuff, I added bogus numbers for everything, just to ensure they didn't bill me again. They should email you back, saying it was cancelled..

Get out now!

You have to email them to tell them you want to cancel. Then they will email you giving you confirmation. The email is billing@groovebook.com

Go to the info page it will tell you.