Help CenterClick on your secure subscription managment link that was sent via email when you first subscribed (please check your spam file if you did not receive it). Click on the billing option and the system will send you a secure link to update your credit card information.
If you cannot find your link, you can create a Live Ultimate account here, using the same email address used for your subscription and you will see the option to manage your subscription there!
If you use ShopPay as your processor vs using your credit card to check out on Live Ultimate, then you will need to reach out to Shop Pay for assistance.