As a Sabbat Box member, you are free to change your payment method whenever you’d like. Just log in to your account with the email and password you created when you signed up. If you have any problems or questions, please contact us and we’ll be happy to assist you.
The login screen looks like this:
Once logged in, select “Payment Methods”. From this screen you have the ability to add a payment method/card.
You also have the ability to manage your cards--delete them, or set one card as your default card, which the system will charge when you are rebilled.