Organization enrollment accepted, but $99 payment page hangs / "redirected too many times"

My Apple Developer Program organization enrollment was accepted on Oct 15. The only step left is the membership payment. When I continue to payment, the page hangs and then shows "redirected too many times." I tried two different cards with the same result, and other online payments work fine. In the Apple Developer app I get "Enrollment through the Apple Developer app is not available for this Apple account."

I have an open support case but have only received automatic acknowledgments.

Can the Developer Support / Enrollment team please review this manually, repair the stuck purchase or allow payment another way, without cancelling the approved enrollment? Has anyone else gotten past this state, and how?

Thank you.