To update your payment information, log in to your account at www.boxycharm.com and click "My Account" from the top menu bar, then click "Payment Method" from the dropdown that appears.
You can add a credit/debit card by clicking "Add Credit Card", or pay with PayPal by clicking "Add PayPal Account".
To begin using this payment method for your subscription payments, please note that you must set the new payment method as your "Default Payment Method".
For more information: