Hey Aman Raizada, Hope you're doing great!

Aman, i'm sorry for saying you that admission in Thapar University has been closed now. You got late, admission date was till 30th of July. Everyone needed to have submitted their admission online forms till 30th of July. Though you can try contacting them on their office contact numbers (available on their official websites) as you have very good marks, maybe they can give you some last chance for admission. But do keep in mind, contact them ASAP.

Best of Luck to you for your Future!