Cleartrip — refund, "convenience fee" scam

I would like to know why airlines are getting away with a "convenience" fee for using credit cards? When we shop on line, or pay utility bills, no such fee is applied. This is another scam to extort as much money as they can.

Recently i purchased a ticket on cleartrip for a jet airways flight from bangalore to chennai. The fare was rs 3508. I had to cancel the flight (Over 24 hours prior) and received a refund of only rs 155/-
Rs 2703 was swallowed by the airline, rs 250 by cleartrip (There is no clear notification when you book on cleartrip that they will charge a fee) and rs 400 for a "convenience" fee!!

Is there anything we can do to bring in a fair refund policy, and remove this "convenience fee" scam on credit cards??

Thank you