@Nancy Morgan
If you want to cancel your personal subscription, please refer to DSPatrick's second link.
As the tag "office-itpro" focus more on genreal qustions of Office desktop clients, and the issues of Microsoft365 subscription are not supported on Q&A forum currently.
If you have further questions about "how to cancel my personal subscription to Microsoft Office 365", I would suggest you chat with Microsoft online, or you may post a new thread on the following forum.
Microsoft Answers forum for Accoun, billing and sign-in
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