To change the credit card that is billed, go to Account Management.
Click on the Billing tab. Underneath the Card on File section is a link to update your credit card.
Here, you'll be able to change the card we charge each month for your subscription, or update the expiration date if the old one has expired.
If your subscription has been cancelled due to non-payment, you can either re-subscribe on the site, or message the Student Happiness team to re-activate your subscription manually.