Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Log into any Microsoft account you may have on this link, do you find two separate Microsoft 365 subscriptions or does the expiry date on your subscription indicate you have nearly two years left on the subscription?
https://account.microsoft.com/services/
If not, go to the Payments and Billing section on any account you may have, do you find the two payments lsited there.
1
If you find two separate subscriptions, you can use the steps provided on this link to cancel one of the subscriptions:
Then, use the steps provided on this link to check your eligibility for a refund.
2
If you do not find two separate subscriptions, 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