Police officer not providing copy of NC complaint (against me)

My farm neighbour filed a false complaint against me in a police station, I got call from concerned police station and The investigating officer called me to the police station, but when I went to that police station, the investigating officer read out the NC application filed against me. when I have seen that complaint copy, on left side of that complaint copy official noting have been written as below, "initially offence is registered under IPC section of 323, 324, 504, 506 by the order of PI with station diary cr no xx and for further investigation application is forwarded to HC xxx". Here deliberately, I want to mention this point, without any investigation how PI or Investigating officer can register case as per IPC act only on the basis of complain application. And if this is the case then why such a readiness does not appear at the time of my complain application against the same people. after that I requested Investigation Officer to provide me a photocopies of that NC application filed by my neighbour (complainant) against me in order to prove my innocence. but IO refused by saying investigation is not yet over and you will get that copy after completion of investigation. Another fact is on said dated complain On the day of the charges against me, I was present in district and session court in another matter for the purpose of appearance. so i want to ask here how can i get my appearance proof from district and session court in order to prove my innocence. so i request here on this forum please guide me how can i prove my innocence and do the needful. Thanking you.