Indian Railway Catering & Tourism Corporation [IRCTC] — Charged excess fare in the ticket counter

Address:

Hassan, Karnataka, 573201

I was travelling from hassan to yeshwantpur, i took the ticket in the counter which was of 70₹ but the ticket collector charged me 85₹ telling its the reservation charge and i boarded the train.
After i boarded again the collector collected 15₹ for reservation charge. This is pure act of cheat in the ticket counter. He is charging 15₹ extra for no reason. I have enclosed a copy of ticket in this complaint.
He charges extra 15₹ and make a handy amount daily.
Please take action against the authority and give me the solution for the extra amount taken.