What you need to do is log-in, go to your account page and select VIEW on the most recent order (which will be on the top of the list). On the next page, select VIEW under "related subscriptions". On that next page you will see your subscription and you have the option to either cancel or change payment. Select change. Go down to where you can select credit card and select "use a new card". Put in new card information and then go to "manage payment method" and delete old card.