Delhi Police — I'm complaining about the complaint I made to a P.S for which nobody has responded to this day.

I filed a complaint against a contractor who supposes to construct my house and give me within the given time. As he's failed to do the same. For that, I made a complaint against him so he can completely work without any hurdles. But the police seem to help/support him for his damages and I don't know how and why the police supported him and made us compromise with more money. Neither police helped us nor file my complaint.
I'm already suffering from mental health because of this.