Indian Railways — suddenly changed station.

Address:

New Delhi, Delhi

Sir, i have reserved a ticket from new delhi to mathu. My pnr no-[protected], train no-12191 dated dec-01-2017. When i reached new delhi to boarding the
Train, suddenly i saw the display the board. The board is showing the train is going from nzm railway station. I catch the train in nzm to pay 300/ rupees.
Who is answerable for this mistake & why not railway inform the passenger.