Air India — Fraud Air India who asked to pay extra after removing infant.

Myself Megha had PNR 4HVFS8, I booked flight ticket from new york to delhi both side, While returing, I removed my infant from my PNR from delhi to new york, I called airindia to remove it and they told me to call to my travel agency to remove because they booked it. My agency just removed infant from PNR, i reached airport and Air india said, they cannot allow me without paying extra charge because when I removed infant my class changed from M to T. I do not know what class class M or T, we do not removed infant.. later they did not allow me to take flight. I NEED MY MONEY BACK. If you have any portal or technical issue in your site, I am not responsible for it..