Where can I complain if my things are removed from cabin baggage during security check?

One of my items was taken away from me during security checkin at Ahmedabad airport. The irony is that nobody stopped me at mumbai airport or international airports such as hanoi, denang and Ho Chi Minh with that item. I have travelled many times and never got stopped. I feel its unfair and these security personnel at Ahmedabad airport just trying to bully the poor passengers. I want to complain. It was not a high value item but it feels unfair provided that it was accepted at other airports in the country as well as outside the country. Where can I complain?