Delete Azure Active Directory Tenant / Microsoft Entra ID

Question

Using the Azure account linked to my Visual Studio subscription I've created an AAD instance.

I cannot delete it. When I click "manage tenants" and try to delete it, I get an error message, and after re-entering my credentials I get a message saying the user does not exist in the tenant. There is one account in the tenant itself, but I've lost its password and self service password reset is not enabled.

How do I delete this thing?

{
  "sessionId": "821107376f13432f891dde65263d661e",
  "errors": [
    {
      "errorMessage": "interaction_required: AADSTS16000: User account '{EmailHidden}' from identity provider 'https://sts.windows.net/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/' does not exist in tenant 'Standaardmap' and cannot access the application 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'(ADIbizaUX) 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: 888ad7b4-5dc8-420a-9607-a7f4d42c1d00
Correlation ID: ddc01dff-c061-4e6b-9765-e883ec2a0dc7
Timestamp: 2023-10-13 16:28:55Z",
      "clientId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
      "scopes": [
        "https://graph.microsoft.com//.default"
      ]
    },
    {
      "errorMessage": "interaction_required: AADSTS16000: User account '{EmailHidden}' from identity provider 'https://sts.windows.net/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/' does not exist in tenant 'Standaardmap' and cannot access the application 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'(ADIbizaUX) 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: 544a06f8-3c06-41d8-8ffb-a9558ee01a00
Correlation ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Timestamp: 2023-10-13 16:28:55Z",
      "clientId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
      "scopes": [
        "https://graph.windows.net//.default"
      ]
    }
  ]
}

and:

Selected user account does not exist in tenant 'Standaardmap' and cannot access the application 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account.