[shkkmo]

If a company makes it difficult to cancel, you can always talk to your card issuer. They are required to allow you to stop all future payments to a recipient but may force you to request this in writing.

However in my experience, you can usually accomplish it with a phone call and can often dispute the most recent charge as well.

IMHO, chargebacks are the best way to fight back against companies that use dark patterns in their billing/cancelation process.