Sign in and go to ACCOUNT SETTINGS and click on the SUBSCRIPTIONS tab. Next, click the PAYMENT METHOD button and click your current payment method to see all available payment methods or add a new one.
The payment method you select will update for all active Auto-Replenishment subscriptions. If you change your payment method under the PAYMENT OPTIONS tab, those changes will not be reflected towards your subscription payment. Any changes you would like to make to the card used for your subscription must be made through the SUBSCRIPTIONS tab.