When I stopped the payment with my bank in January, their system refused to let me use ACH payments anymore, and said I had to put in a credit card number in order to even log in and see my balance and history. Okay, sure. I put in a credit card number for a cash card that didn't have any money on it.
Then, their system said that I couldn't remove my credit card number from their system without putting in some other payment method (which had to be another credit card). But, in order to have a card number stored in their system (which I couldn't remove), I had to pay a $4 per month credit card storage fee.
This was when I started just mailing them checks and researching lawyers in Texas so I could take them to small claims court. I also sent the whole thing with documentation to the FTC explaining it as succinctly as I could.