Hello dear,

First of all congratulation on qualifying the CAT examination.

Make sure that during your admission procedure at that time your college didn't sign any shot of petition that money is none refundable.

If such kind of petition is signed by them then we are sorry to say that u can't raise your voice against them.

If no such petition is signed the college is bound to refund the security amount deposited by you. Firstly you should send legal notice through a lawyer. If not getting any response, then file a complaint before the consumer court. You may file a criminal complaint against a  college as well.

Thank u

Hope this will help you out.