Cannot delete Entra tenant – sole Global Admin, no support ticket option

Product: Microsoft Entra ID

1. Topic: Tenant management

I accidentally created a Microsoft Entra (work/school) tenant using my personal email address. The tenant has no subscriptions. I am the only user and the only Global Administrator. The Global Admin role cannot be removed. The tenant cannot be deleted. The DeleteTenantBlade fails with ErrorLoadingExtensionAndDefinition. The Admin Center does not offer a way to create a support ticket. Please escalate this to Microsoft Support and perform a backend tenant deletion.