Same thing happened to me. I never use autopay, always pay manually, and still got charged. File a dispute with your Credit Card company. That's what I ended up doing and they refunded me in about two days. Quite a few people on this thread mentioned the same thing about being charged without authorization. I did manage to close my account through the 'email ticket tech support', so I'm hoping it doesn't happen again.
It looks like this service is basically dead, so people should move on. Sucks because it was pretty decent too. 75% of this thread only says "DM" for the messages, so you really aren't getting much help other than seeing that.