Thank you for reaching us!I understand that you are having trouble deleting your Microsoft personal account.
Based on the information you provided, it seems like the error message you are seeing is related to a work or school account that is associated with your Microsoft personal account.
Since you mentioned that you have never used Azure or signed up for anything on Azure with this account, it is possible that the work or school account is associated with a different Microsoft account that you may have used in the past.
could you check if you have any other Microsoft accounts that may be associated with a work or school account. by following the steps, you can find and Leave an organization where you have a guest account.
If you would like to close your Microsoft account, please go thought How to close your Microsoft account
If you are still unable to resolve the issue please do let me know in the comments section.
Thanks,
Akhilesh V.
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