Air India — Charging customer under the pretext of policies without any relevance

Address:

mumbai

I booked my tickets as per Aadhar card and Pan card where my name is split into first name and Last name . In my passport my first name contain bothe the names and there is no last name.
To my request to make correction, I am asked to pay $448 and differential fare of $300.
I respect policies but here policy is being used as an opportunity to charge more from a senior citizen pensioner who is feeling like cheated and harassed. I have my wife on the same ticket and my daughter under different ticket but on the same flight on 13th May and there is no way I can cancel this travel. Request Airline with Indian heart to be more humane and consider my request to make correction.