Dear Subin Bhatia,
I’m sorry you have been unable to use a feature that was important to your decision to upgrade.
Since Copilot is also unavailable in Outlook on the web and Support has confirmed that the issue is under investigation, further troubleshooting through the community may not resolve it. This is a user-to-user forum, so we cannot access your account, escalate your support case, provide an internal incident ID, or approve compensation.
Please continue with Microsoft Support using your existing case number and ask them to review the case for escalation. Since the issue remains unresolved, you can also ask what compensation, service credit, refund, or other billing options may be available.
Thank you so much for your patience and your understanding!
Warm regards.