GoAir — wrong first name

Today, i booked airline tickets from nagpur (Nag) to jammu (Ixj) and return tickets as well for my parents and grandmother. But due to my misunderstanding, i put in my grandmother's name as mrs. Lalita modak instead of mrs. Lata modak (On aadhar card). This misunderstanding was because her name was changed after marriage but we still used here old first name in day-to-day life. I tried to convey this to customer care representative to change the first name but my request was straight-out refused and he advised me to cancel the reservation. Cancelling the reservation just within one hour of booking it just for the sake of re-booking with correct first name made me felt being extorted.

Flight booking details-
Nagpur to jammu - zy67ng
Jammu to nagpur - lehvfe