Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I'd be delighted to be directed to EXACTLY where in Microsoft Support I can put my case number.
@Ashley Lunan,
If you have been in touch with Microsoft support earlier, you have to contact them again, via https://support.microsoft.com/contactus .
Q&A are user-to-user forums. Contributors do not have access to user accounts or billing information.
You can try signing in to https://account.microsoft.com/services with your various @hotmail.com or @outlook.com accounts; with a bit of luck, you will find the correct account yourself.