A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
This forum is just a user to user forum, no-one here has any account access, try using this method to contact their support to get a refund for the double payment for the Microsoft 365 subscriptions.
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