Hello Abhigyan
To fix issues with name mismatch, you should get assistance from Microsoft Training Support team.
You may want to follow these steps.
Go to MS Training Support at https://trainingsupport.microsoft.com/en-us/
You should see "Ask a Question" button. Click on it.
Mention your query on the Question page, describe your issue with a suitable Title.
Select the below to categorize your question and then Submit.
- Forum: Microsoft Credentials
- Support Area: Learn
- Topic: Profile
- Sub topic: Legal Name change
- Check "Notify me when someone responds to this post" to receive email notifications.
Someone from MS Support should get back to you in the next working day or two.
Hope this helps.
***Please mark the answer as Accepted if you are satisfied with the response.