Regarding a property matter

In year 2007 we won a case and a permanent injunction was granted to us in city civil courtBangalore. After this in yr 2009 the opposite party has registered our property also in favour of his brother .Next in yr 2017 opp part brother has put case on us stating the property belongs to him . And he has given a Police complaint stating that we have forged the sign and have acquired his property . And the case is registered in magistrate court and criminal court . So my Question is complaint in police station was given on 2/aug/17 and in court case was registered on 4/Aug/17.IF the case as to registered means .....then FIR as to be filed ....without enquiring both the parties how the FIR can br registered and case can be put in court .We got intimate about this on 1/Dec/17. From 4months ...we are getting notice now ...and still now ..we dint knew the case registered against us . Wen we gv return complaint to that notice ,the police SI dint take it ....So wat action to be taken ?? Against SI ........and is the remedy for this . How can we proceed ?? Should we intimate DG and IG about this ???