Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Please provide some more detail on this, you indicate you have cancelled the Microsoft 365 subscription, is that correct, and if so, did you receive a full refund for that subscription?
Do you pay Microsoft directly for the subscription or do you purchase that through the Apple App Store?
1
If you did not receive a full refund, if you pay for the subscription through the Apple Apps Store you need to contact Apple Support on this link.
https://support.apple.com/118428
2
Otherwise, this forum is just a user to user forum, no-one here has any account access, you will need to contact Microsoft Support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option