Hi, I'm John!
Are you using personal Microsoft account or a work or school account?
If personal Microsoft account:
- Go to https://support.microsoft.com/home/contact
- Click "Request History" from top left area.
- Click "Sign in" and sign in your personal Microsoft account.
- Then check case number under "Service requests".
I really hope this information is helpful! Let me know if you have any further questions or concerns.
Regards,
John J.D.