Cleartrip — cancellation by airline(spicejet) and minimal refund

Website:

www.cleartrip.com

I and My Husband (Dr P B N Gopal, Head of the dept, Continental Hospitals, Gachibowli, Hyderabad were to travel back from Rajahmundry by Spicejet SG 1602 (Trip ID [protected] Cleartrip.com)
But I have received a message from Spicejet on the 29th Nov 2018 citing the cancellation of their flight SG1602. I have actually been waiting to hear the same from "cleartrip" since then. Curious to know what happened almost 21 days later, I logged in to the cleartip website and it said, if the airlines have cancelled, I have to go ahead and cancel on the portal (strange, they facilitate booking from us and take charges, but when the airlines cancel, they don’t facilitate and get back to us--a one way business of sorts!!)
Anyways, I cancelled and it said I will know the refund amount after they hear from the airlines

And within moments I get a refund of Rs 66/--{{Booking Gross Amount was (+)Rs. 4, 990.00}}
It is the airline which cancelled the flight, not us!
Why should our whole money be not refunded ?