Hi Kishore,

Usually, the college will not entertain such requests until all the allotment rounds are complete, however, if you feel the need to change campus you can go ahead and contact the admission board and see if you can get a seat in one of the other campuses based on merit.
If the rounds of allotment aren't complete, you can also ask them to let you go through the procedure again in the hope of securing a better seat.

Cheers.