Ibibo Group / Goibibo — Cancellation of flight ticket non refund

Address: New Delhi, Delhi, 110078

I booked two tickets through goibibo for flight from bangalore to delhi on 7th june 2016 vide pnr ylgvrx. I had to cancel the ticket on[protected] due to dimes of my mother in law.
I used my indian overseas bank debit card. Goibibo charged rs900/ for cancellation in addition to rs3840/ charged by air asia.
The cancellation amount has not yet been credited even after 20 days.