For existing subscriptions, you may change your payment method for future shipments at any time.
Log in to your dashboard and tap Manage Payments in the menu at the top of the page to view the payment method(s) on our subscription account.
Then tap the type of payment method you'd like to add to the subscription and tap Submit.
After you've connected a valid payment to your subscription, you may also remove old payment methods from your account. Simply tap under Payment Methods and tap Remove.