To update your billing information, first, log in to www.puzzlesociety.com with your current username and password, then click Member Settings, then click Update Your Billing Information.
You'll be sent to our secure billing system, which may ask you to log in using your username and password one more time.
Next, click on your subscription (this is a link under where it says "Active"). On the following page, locate "Payment Information," then click the edit button. Follow the steps from there to update your credit card.