Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If you have cancelled your subscription, usually you are entitled to a refund which may take 5 business days to be credited to your account, not all cancellations result in a refund, you can check your eligibility to a refund using the steps on this link.
If it is indicated you would receive a refund for the cancelled subscription log into your Microsoft account on this link, https://account.microsoft.com/services/ then go to the Billing and Order History section to check the status of the refund, if you do not receive the refund, 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