Hi, I'm John! I will help you with this.
Microsoft Q&A is public, and we can only provide information. It is beyond our capability to assist directly with the account or login-related issues.
Do you still have access to your Microsoft account associated with your Minecraft account, and are you currently signed in?
Check if you still have access to your Microsoft account and make sure you're currently signed in https://account.microsoft.com/ If you’re locked out, let me know.
Just to be safe, I’d recommend to sign out everywhere. Visit: https://account.live.com/proofs/manage/additional Scroll down to Sign me out and select "Sign me out".
And changing your password again and enabling two-step verification if you haven’t already. This will add an extra layer of security to prevent future unauthorized access.
If you notice anything unusual in your account settings or purchase history, you might also want to check the Microsoft account security page https://account.microsoft.com/security to review recent activity.
If you need to contact Microsoft Support via live chat for further assistance, please let me know.
I really hope this information is helpful! Let me know if you have any further questions or concerns.
Regards,
John J.D.