@Wendy Pritchard I would recommend to contact Billing and Subscription team would be the best to provide more insight and guidance on this scenario: Free billing and subscription management support has been provided. it's the best choice for you. They can provide the detailed information on your scenario and root cause analysis.
Additional information:
To trace what account was used to create the subscription, you can try the following steps:
Check your email history for any emails from Microsoft related to the subscription. The email may contain information about the account that was used to create the subscription.
Check your browser history for any Azure portal URLs that you may have used to access the subscription. The URL may contain information about the account that was used to create the subscription.
Contact Microsoft support for assistance. They may be able to help you trace the account that was used to create the subscription.
Once you have identified the account that was used to create the subscription, you can try to reset the password for the account or contact Microsoft support to regain access to the account. Once you have access to the account, you can delete the subscription.
Please let us know if you have any further queries. I’m happy to assist you further.
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