[HumJanenge] Request to for guidance in legal issue

I purchased a flat 3 years ago. 1.  The builder, a private ltd. company, fails-refuses to execute sale deed under this or that excuse. The representation-sale was done by its Marketing manager, so there is a case against him. But do I have a cheating case ... against the Managing Director also? 2.  The builder was obligated to obtain NOC from navy prior to construction, but failed to do so.  Moreover, the builder made false representation in the Agreement to Sell that they had obtained such NOC. What law covers the aviation sector and this NOC? 3.  Is is better to first file a complaint with police or directly with the court? Thanks, Regards, Victor