Otherwise, in cases where you have a very pernicious party that will absolutely not stop charging your card, you can contact your bank and have them cancel that card. When they do, there is often a convenience feature that allows pre-existing subscriptions to continue to bill using the old card info. You need to make sure you tell the bank that you do not want that to happen for this card. They have a way to shut that feature off and that will remove the ability for the company to abuse that feature. You can still end up accruing a debt with them that they may try to collect on eventually so this is not a suggested method to get out of a subscription, but when you have tried everything else, it does seem to work in my experience.