Microsoft Store developer support inaccessible—Engage Center stuck in Chrome and Edge

I manage an existing Individual Microsoft Store developer account. I can access Partner Center and manage my published app normally.

I need to open a private support case about package-flight delivery, but the support portal is inaccessible.

What I have tried:

• Windows Developer Support → Create support case (MSA).
• My app’s Partner Center page → Contact Support.
• Both Chrome and Microsoft Edge, using my publisher-owner personal Microsoft account.

Both entry points lead to Engage Center, where the support page remains stuck loading. Closing that view revealed “No Access.” Selecting the available “Support for Business” workspace returned to the loading screen.

The Engage Center Help panel contains documentation and Ideas Forum links, but the documented “How can we help?” assistance section is absent.

Please help verify my support access or provide a working route to open a private Microsoft Store publishing support case. I have screenshots and a prepared evidence packet available.