Indian Railways — I'm complaining about a harassment in ticket counter at kolkata, chitpur station

Today at 8.30 am, I brought 3 tickets from Kolkata station ticket counter for Kolkata-Haldibari-Intercity Express bound Rampurhat. We asked the the person in the counter several times if the route was changed of the train. But, he confirmed very confidently that there is no Change in routes and gave us ticket printed via dunkuni bound rampurhat. But after crossing Bandal, I have just realised the train is not running in our expected route. There was no announcement in the station about the change. I'm harassed, who is responsible for this harassment?