Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi Cristian,
Thank you for choosing Microsoft Community and thanks for providing us an opportunity to assist you.
Cancelling the Office 365 subscription will not erase or close the Microsoft Account.
However to cancel the subscription you may sign into the My Account page on Office.com with the Microsoft account you used to register or purchase.
http://office.microsoft.com/myaccount
To cancel or close the Microsoft account, refer to the following link and check if it helps:
http://windows.microsoft.com/en-US/windows-live/account-close-account
I hope the above information helps. If you need further assistance with the issue, you can always reply and I’ll be happy to assist you.
Thank you