If police refuse to register your FIR, you can make a complaint to a higher ranking officer such as the Superintendent of Police (SP), the Deputy Inspector General (DIG) or the Inspector General of Police (IGP).
You can also complain to the nearest judicial magistrate, who will order the police to register the FIR if deemed necessary. Ensure that you get a receipt of your complaint being registered.
You can also send your complaint in writing to the Superintendent of Police (SP) by registered post.and also send make a written complaint to the concerned State Human Rights Commission or the National Human Rights Commission that the police are not doing their duty of enforcing the law or that they are being negligent, biased or corrupt
You can file an online complaint, find relevant information and also get the contact details of each State’s own Human Rights Commission office on the website of the National Human Rights.