Fir against builder under mofa act section 13 and Ipc

Respected sir, i m chairman of the mohan nagar chsl with 249 members. We had filed a criminal complaint to charkop police station against builders under mofa act section 13 for not giving conveyance since last 26 years and under ipc for cheating and fraud for submitting additional building plans behind our back to grab our fsi. Police were managed by the builders and they sat on the complaint for 5 months. Later when one of our member filed a writ petition in high court for delay in registering fir just 2 days before the hearing police send us a report that on conducting a preliminary enquiry they have come to the conclusion that certain facts are civil in nature and hence directed us to competent authority. High court dismissed the petition saying that you must file a private complaint against builder in magistrate court.. Now please guide us if we should go under section 156(3) or for private complaint under section 190 and summons procedure under 200 to 204. Our lawyer suggested that we go under 200 to 204 since under 156(3)the corrupt police will once again help builder.please kindly give us a comparative analysis