Hi Gopesh,

I hope you have been allotted a seat at the National Institute of Technology Jamshedpur through counseling, the thing you can do is accept the seat allotted to you just to have a seat confirmed in your name. Once you accept this seat you can apply for upgradation of seat wherein you can change your current seat in the consecutive round of counseling if you are allotted a new seat in some different college. 

Also since you have secured a rank good enough to be in NIT Jamshedpur, you can try considering admission in some other private engineering college which offers a better education, etc than that of NIT Jamshedpur.

BEST WISHES!