The Professional Couriers — Courier not delivered since long time

Address:

Hyderabad Chandannagar, opp R S brother's

I am from Hyderabad, one parcel dispatched from Mumbai to Hyderabad on October 8 2020, fron NSDL since then I have been tracking online after keeping in transit on November 4 suddenly showed status as delivered. Since then I have been continuously following branch and Hyderabad head office and even called to Mumbai office every time they say it will be resolved it's almost 2 weeks I have been continuously following up with complaint stiil issue not delivered item, at least no proper response. I am getting doubt are we in democratic country. Can you please suggest how can I punish them legally, is there any way to punish the responsible people, not to repeat again to any people, I never faced this kind of situation in my life this is worst kind of people Chandannagar branch Hyderabad then never pick call, no proper response. Please suggest