You can file a case of Cheating against them. Make sure you have enough evidence to prove your case. Section 415, 420 of IPC will cover your case as you have been defrauded by them.
Section 420 in The Indian Penal Code
420. Cheating and dishonestly inducing delivery of property.—Whoever cheats and thereby dishonestly induces the person deceived to deliver any property to any person, or to make, alter or destroy the whole or any part of a valuable security, or anything which is signed or sealed, and which is capable of being converted into a valuable security, shall be punished with imprisonment of either description for a term which may extend to seven years, and shall also be liable to fine.
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