Hello Suraj Sah Kanu,
Thank you for posting your query on the Microsoft Q&A forum.
I'm going to resume something from https://github.com/orgs/community/discussions/111352#how-long-after-i-submit-my-application-will-it-be-approved
You will need ask to the community about the credits here GitHub Education community
How long after I’ve been approved will I receive my academic benefits?
Congrats, your request has been approved and your benefits will be available soon!
First off, congratulations on being approved. 🎉 When you submit your application, you'll have your academic affiliation verified and gain access to GitHub Education right away.
We aim to provide you with your educational benefits within 3 days of this approval status. However, during busy periods like the start of a new semester, it may take a bit longer.
If you have not received your education benefits within 5 days of your approval status please raise a discussion on the GitHub Education community and the Education community team will be able to assist in resolving this for you. 🌟
You’ll get an email notification once your academic benefits are ready, or you can check your status anytime under “GitHub Education” in Billing and plans.. Meanwhile, as a verified GitHub Education student, you can explore the platform, connect with a local Campus Expert , attend events hosted by student leaders and GitHub Education, discover and contribute to student-created repositories from GitHub Community Exchange and much more!
You can mark it 'Accept Answer' and 'Upvote' if this helped you