You're automatically charged ~$50 every month unless you log onto their website and elect to 'skip' the charge within 5-day period each month. You can't stop the recurring attempts to charge without calling their phone number, where they force you to sit and listen to minutes of sales spiels (I actually didn't make it until the end of the spiel it was so bad). They rebuff attempts to cancel accounts via email.
Customer service is intentionally unhelpful and obtuse - they're trying to create so much friction to disengaging with the company that you just give up. It is a terrible, terrible way to do business and it's really biting them. Here's a tip: if your product sucks so much that you have to slime and manipulate your way into keeping customers, you should probably just give up.
I strongly encourage anyone dealing with an unauthorized charge from this company to dispute it with their card issuer and place a stop-debit on the merchant.