earlier replies
Replying to @nephit_
If you no longer have access to your Microsoft account, we'd suggest contacting Microsoft Support for recovery options. Select the "Manage a Microsoft account" option, and carefully read and go from there: msft.it/6019i3ysF. ^FF

Account & profile | Xbox Support

Find everything you need to manage your Xbox account, profile, and more.

support.xbox.com
I understand that this is an unpleasant situation and empathize with the circumstances, but we cannot recover Microsoft accounts for players. The only action we can recommend is to return to Microsoft Support. -AG
Replying to @nephit_
We can assist with deleting your Minecraft account: msft.it/6017i3FvP. However, for managing your Microsoft Account you will still need to contact Microsoft Support. For questions about closing a Microsoft account, please see msft.it/6018i3Fvu. ^FF

Dec 1, 2023 · 10:28 PM UTC
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We hear your concerns about the information you may need to process the request. The support agent may ask a few questions to determine whether you're verified as the owner. In the meantime, please do continue to work with the agent so that your request can be processed. -AG