For anyone trying to avoid this, sign up to Personal Capital (bought out by empower or something), link up ALL your bank accounts, credit cards, etc. Then once a month go in and check every single line item charge and ensure the charge was properly labeled.

Now if a companies autocharge is extra sketchy, such as not informing you about auto pay, enabling it automatically, etc, just threaten a chargeback when contacting their support and most the time they'll immediately refund you.