Hi Grant,
In general, users can refer to the following steps to update the credit card information:
1. Go to Admin > Licenses (or Licensing).
2. On the Subscriptions page, click a subscription name.
3. On the Subscription details page, under Payment details, click Edit, and then follow the instructions.
If you have tried those steps, but are still not able to update it, I’d like to collect your domain via private message to check the status of the service.
To read private messages, you can perform the steps below:
.Go to the your details section on the right side of the community site.
.Click Private messages.
.Click the subject title of the response to read the message.
.You can reply by using the form in this display.
.Click Submit Reply.
Thanks,
Vivian Wang