Once upon a time, Keybank refused to block a merchant from debiting my account (I can't remember if by card or account number, it was a decade ago), because, they said, "if I hadn't canceled, I had an active subscription". They seemed apathetic to the concept that it wasn't their job to facilitate the merchant's attempt to have payment rendered (if I'm having a hard time canceling a subscription and this is my resort, then that's between me and the merchant. The bank is a neutral party, at worst - ideally they should be supportive of me saying "I don't want this entity to take my money").

Closed my account and moved on.