New tenant blocked with AADSTS5000228 after sign-up card verification – cannot open a support request

Our company's new Microsoft Entra tenant was created on 28 Oct 2026 through Partner Center. The payment verification step did not complete, and the tenant became inaccessible. On 29 Oct 2026, we completed the Azure free account sign-up with the tenant's administrator account, including card verification; the page showed "We are still preparing your subscription", and no email has arrived. Every sign-in to the Azure portal or the Entra admin center now fails with: AADSTS5000228: Access to '<tenant>' tenant is denied. Please contact your administrator.

Because the administrator cannot sign in, we cannot open an Azure support request: from a personal Microsoft account, the support portal fails with AADSTS16000. Could a Microsoft moderator help us get this tenant reviewed and unblocked? We can share the tenant ID, the administrator account and our company registration details privately. We only need the tenant to register a multi-tenant Entra application (delegated Mail.Send).