CBI will not take up such cases of frauds, where a private person has defrauded another private person. This comes within the jurisdiction of the local police.
So, you should approach the local police station within the area of which, this fraud has taken place and file your FIR. However, many a time, it is seen that even the local police may not register FIR as they avoid taking up more cases, especially of financial nature. In that case, you may have to file a private criminal complaint case in the Magistrate court in your area. Consult some local lawyer for this purpose, if needed.
Secondly, in addition to the criminal case, it may also be possible to file a civil suit against the person concerned for fraudulent deals like this.
In the absence of having seen the full details of your case, it is not possible for me to advise you on this aspect. You may contact some local lawyer and show him all your documents / details for a proper advice.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.