If you were the genuine purchaser as stated by you, the bail application filed by you should not be withdrawn. You should concentrate on it and first get yourself enlarged on bail by complying with the conditions imposed therein. Next, you may lodge a complaint with the police for cheating offences against the power agent, if the police are reluctant to take any action in this regard, you may file a petition before the jurisdictional judicial magistrate under section 156(3) cr.p.c. seeking its direction to police to investigate and initiate necessary action against the accused PA. Next, based on the proof of evidences of having given money of Rs. 7 lakhs to the power agent, you may file a money recovery suit on the basis of cancelled sale agreement. Before that you should issue a legal notice to the power agent cancelling the sale agreement and demand return of the advance amount owing to his fraudulent sale transaction.
Lastly, you should engage a prudent and expertise advocate who can handle all these issues perfectly.