You can view your payment information by hovering over your picture in the upper right hand corner and selecting Premium Account, and then selecting the Payment Information tab. You can also follow this link to be directed to that page: https://www.firstmet.com/premium-account/?link=PremiumAccount&from=nav_dropdown#/PaymentInformation
If your credit card you entered is no longer valid or if you'd like to use a different method of payment for your next billing, you'll need to update your account information to make sure your subscription will successfully renew. At the top of the screen you will see "Payment Method". You can add a new card by clicking "add card" or "update" if you are updating the same card you have on file.