Hi James,
We apologize for the inconvenience caused, as per the description above, you want to update the billing information in your Adobe account for Adobe ExportPDF service, Is that correct?
The record shows that you are subscribed to Adobe ExportPDF service with your current Adobe ID and the service is active. For billing issue, I will request you to contact the Adobe support through the URL Contact Customer Care
I have also shared the direct contact details of Adobe support via private message, please check the email inbox.
To manage your subscription, you may refer to Manage your Creative Cloud membership
Feel free to update this discussion for any further assistance.
Regards,
Anand Sri.