"GitHub Copilot Enterprise (via Azure Credits)" benefit on Billing Profile, but GitHub rejects it

Hi all,

Posting here because we are stuck between three support teams and hoping someone has already been through this.

Context

We are a Microsoft Solutions Partner. Every year we redeem the "GitHub Copilot Enterprise (via Azure Credits)" benefit from Partner Center. Until last year, redeeming it meant assigning the benefit to a user, opening an activation link and getting a new Azure Sponsorship subscription (quotaId Sponsored_2016-01-01). We linked that subscription to our GitHub Enterprise under Billing and licensing, Payment information, Metered billing via Azure, and it worked fine.

What changed

After our renewal this year, Partner Center uses the new modernized redemption flow. The credits are deposited directly onto our MCA Billing Profile (the one tied to the partner program purchase). Partner Center confirms the redemption was successful and the credits are visible in Azure.

The problem

The only subscription offer we can create under that Billing Profile is Pay As You Go (0003P, quotaId PayAsYouGo_2014-09-01). Other offers say we are not eligible. When we try to add any of these subscriptions in GitHub, they are greyed out as "not supported". Our old Sponsorship subscription has expired, so we have the credits but no way to spend them on GitHub Copilot.

What we already checked

1. We are Owner on the Azure subscription and owner on the GitHub enterprise.
2.  The subscription permission validation app has admin consent. 
3.  Marketplace purchases are enabled on the Billing Profile. 
4.  GitHub and Azure use the same Entra tenant.

Support so far

Partner Center says the benefit was redeemed correctly and the issue is on the Azure side. Azure Billing says they cannot change the subscription offer or create a Sponsorship subscription, and points us to GitHub. GitHub says the subscription type is not supported as a payment method. Our distributor told us they are seeing the same issue and have escalated it with Microsoft.

Questions

1. Has anyone managed to use the Partner Center GitHub Copilot credits with GitHub after the move to Billing Profile redemption?
2. Is there a specific Azure offer or subscription type under an MCA Billing Profile that GitHub accepts?
3. Did GitHub Support manually enable a PAYG subscription for metered billing in your case?
4. Is there a support path or escalation contact that owns this end to end across Partner Center, Azure and GitHub? 

Any pointers are appreciated, even "same here". Thanks!