Microsoft Customer Agreement created without Billing Profile after CSP deauthorization

I am the Global Administrator of a Microsoft 365 tenant that previously had an Exchange Online Plan 1 subscription supplied through Endurance International Holding B.V. (Bluehost).

This is not a mailbox migration issue. My mailbox already resides in Exchange Online within my existing Microsoft 365 tenant. The only intended change is to move from the former Cloud Solution Provider (CSP) to direct Microsoft billing after the CSP was deauthorized.

The Partner Relationships page now displays:

Endurance International Holding B.V. (Netherlands)'s account is closed. Find a new partner using Partner app finder or buy from Microsoft directly.

Following Microsoft's guidance, I have:

Created a Microsoft Customer Agreement (MCA)

Created a Billing Account ("Pecten Development")

Added and verified a SEPA payment method

Updated the Sold-to and Technical Contact details

However:

Purchasing Exchange Online Plan 1 continually requests a Billing Profile.

Completing the Billing Profile workflow never creates one.

My Billing Account contains no Billing Profile or Billing Scope.

Azure Cost Management reports that there is no supported billing account or subscription.

I therefore cannot purchase Exchange Online Plan 1 directly from Microsoft before the existing subscription expires.

I have also confirmed that:

The former reseller account is closed.

There are no delegated partner roles remaining.

Microsoft support repeatedly directs me back to the former CSP.

Bluehost have confirmed they can no longer escalate through Microsoft CSP channels because their reseller relationship has ended.

My current diagnosis is that the Microsoft Customer Agreement has been created successfully, but the associated Billing Profile/Billing Scope was never provisioned. This leaves the tenant unable to purchase services directly from Microsoft despite the former CSP relationship having been closed.

Has anyone encountered this after a CSP deauthorization?

Does this require intervention by the Microsoft Commerce team, or is there another way to force creation of the missing Billing Profile?

If a Microsoft moderator requires my tenant ID or billing account details, I would be happy to provide them by private message.

Thank you.