Hi ASL,
Since you are a Global Administrator, may I ask whether you're still able to access Microsoft 365 Admin Center or not? For billing and subscription related matters, you need to contact Microsoft Billing Support team through the Microsoft 365 admin center, as the Billing team is the only team authorized to handle billing-related matters.
Here are some tips for creating support tickets more effectively:
- Sign into Microsoft 365 admin center with your Global Admin account > Support > Help & Support.
- Turn off the "Support Assistant" feature.
- Use the keyword "Support" to quickly bypass automated suggestions > select Contact Support.

- In the ticket description, please provide a clear and detailed explanation of the issue and your billing information. You may also attach relevant screenshots or screen recordings.
- Change the title so the ticket will be routed correctly to the Billing team, for example "Billing Issue - Subscription Renewal"
- Additionally, sharing your preferred contact times can help the support team handle the case more efficiently.

Important note: If your subscription was bought through a partner/CSP, there maybe no available option to create support ticket in Admin Center Help & Support. In this case, you need to contact your partner and ask them to create a support ticket on your behalf since the support entitlement is handled by the partner.
Hope the information provided has been useful. Please feel free to reach out anytime in the comments of this post if you need further assistance. I'm happy to assist you further.
Thank you for your patience and understanding.
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