Hi Mr. Anil Sharma!
I have gone through the entire documents uploaded about you, and following is my advise to you:
Firstly, a criminal complaint is more formulated in nature. The complaints lodged by you lacks the essence in terms of communication of complete facts, and how the offence of attempt to murder is made out as per law. I advise you to approach a professional in getting police complaints drafted.
Secondly, once the first step is completed, you appraoch the CMM of the appropriate jurisdiction of that area to seek his intervention in getting the FIR registered under the offence of attempt to murder and other offences made out against them. Besides this, file a writ petition before the High Court of the appropriate jurisdiction to seek protection orders so that if you really feel there is a threat from these persons to your parents, an order can be sought to direct the local police station to assign one beat officer for their protection.