Individual enrollment blocked in app and web: next support step?

I’m trying to enroll as an individual in the Apple Developer Program. My account details are correct and two-factor authentication is enabled.

The app says: “Enrollment through the Apple Developer app is not available for this Apple Account.” The website says: “Your enrollment in the Apple Developer Program could not be completed at this time.”

I opened a Developer Support case on October 7 and followed up, but haven’t found a substantive response. Phone support is currently unavailable through my case.

I understand the forums can’t review private account information. What is the official route to request an account-specific enrollment review or alternative identity verification through my existing case?