Vistara Airlines — Ticket cancellation amount is huge

Address:	Raigad, Maharashtra, 110001
Website:	www.airvistara.com

want to cancel my ticket as I am not traveling due to some unavoidable circumstances . When I visited to cancel my ticket online, I found that airline cancellation charge is Rs-4085. This is a huge amount . In ticket value of Rs-5461, I am getting only Rs-576. I am a middle class people and such a huge cancellation charge is applied then how a person will survive . I am not able to understand how Airline works ? Really very bad experience of Vistara . I thought this is a new airlines and having tie up with Tata then their service will better. Such a bitter experience is never hope. Hope you will take necessary action and help me to get better refund.
I have two tickets having PNR No-43Y862, 43U6CB. Think how much money I will get. If my respectable money will not refund I ll complain in Consumer forum. I got only Rs-576. Refund attachment shown below. Its shame on airlines, how a middle class will survive. How a person will survive this is a big question ? We cannot think about flight after such bitter experience.
Waiting for your favorable response.