contact sign up already but not materialized.

To inquire about a missed phone appointment with Microsoft support, use the Microsoft support contact flow again and choose live support.

1. Go to Get Help on the web.
2. Describe the issue and select Contact Support.
3. For a home Microsoft 365 scenario, choose Microsoft 365 and Office.
4. Select the closest category for the existing case, such as Manage account Subscription or Technical support.
5. Choose Chat with a support agent in your web browser if available.
6. Provide the existing support request details in chat and ask for an update on the missed callback or phone appointment.

If chat is not available, the support flow can also offer a call request option, where Microsoft calls back.

If the issue is specifically about a Microsoft account sign-in problem, start with the sign-in helper first. Support agents cannot send password reset links or change account details.

References:

• Contact Microsoft customer support
• how do I get an update on my support request number - Microsoft Q&A
• I have paid for a Microsoft 365 subscription... how do I contact a human by phone? - Microsoft Q&A