User is receiving Azure invoice emails but cannot access them due to an AADSTS16000 identity/tenant mismatch between their personal Microsoft account and the billing directory

I once had some azure stuff at a free level. Thats is gone, not used. I am still receiving emailed invoice for small EUR sum.. WHen I click to see them, and log in .. I get a pope up errorsm indicating authentication problems and need to connect to a work or school enail address. I dont have work or school email address. When I logout and login .. same problem and still invoices still come.

    {
      "errorMessage": "interaction_required: AADSTS16000: User account '{EUII Hidden}' from identity provider 'live.com' does not exist in tenant 'Default Directory' and cannot access the application 'e6694c91-1590-4e35-9bb7-b865c638b9c1'(Microsoft_Azure_SupportPortalExtension) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account. Trace ID: 4fc10095-243f-47d2-aa9b-374761b04400 Correlation ID: af42f5bf-142e-4b09-91bc-eb51928e6e53 Timestamp: 2025-12-12 14:34:55Z",
      "clientId": a