Step 1: Go to wildearth.com
Step 2: Under 'My Account' click 'Sign In'
Step 3: Enter your email address in the 'Email' field and click 'Continue'. You will immediately receive an email containing a 6 digit code.
Step 4: Enter your 6 digit code in the 'your code' field and click 'Continue'
Step 5: Click 'Profile'
Step 6: In the 'Payment Methods' section click 'Edit'
Step 7: Enter your card information in the 'Card Number' field and click 'Update'