India Post — parcel opened and material not available in the parcel

Address:

Pune, Maharashtra, 411001

Parcel booked on 26 feb 2018 from pune city post office to patna.
The parcel was actually weighing 19090grams originally but when the parcel was recieved by the customer it was hardly 4 to 5 kg.
It contained led flood lights 100w qty 04nos 125w qty 05nos. Instead when the parcel was opened it contained books inside. This is a shame to your indian postal services. Due to some indigiuos persons in the channel this has happened.
I never expected our postal services to be such worst.
Kindly help me in the redressal.
The customer also has the cctv footage of the opening of the box.