I'm facing a very similar issue, although my case has progressed a little differently.
I first contacted Apple Developer Support in June after I was unable to proceed with enrollment. Apple requested additional verification, including identification, a screen recording, device information and SEID, which I provided.
After more than a month of review, I was eventually told that, "for one or more reasons," my enrollment couldn't be completed and that Apple couldn't continue with my enrollment at that time. No specific reason was provided.
I've since contacted Developer Support again by email and phone asking whether there is an appeal/reconsideration process or anything I can correct, but I still haven't received a clear answer.
My support case is 102915374949.
If anyone from Apple Developer Support sees this, I'd particularly appreciate clarification on whether there is an appeal/review process for cases like this, or any legitimate way to have the enrollment reconsidered.