Criminal trespass & accountability of police to register f.i.r

I HV a property in Kerala, found that distant relative has trespassed,started to occupy it.I got certified copy of sale deed,tax receipt, and complaint was regd (P.E) in local police station .thereafter Criminal trespass F.I.R police either delaying or somehow seems to be avoiding. What best could be done as representation to local SP,and state police chief with supporting submitted but of no avail Regards,Ayan Is R.T.I Going to help? I stay away for Kerala so the police trying to delay on some or the other pretext & I m having a harrowing time,need help,district Thissur, area-- pazhayannur police station, my house is in Thiruvillwamala, near to ottapallam