Goibibo — Refund not credited.

Hello, this is Soumili Chatterjee a user of Goibibo. I booked a Indigo flight from Kolkata to Kochi PNR: T2S5XM that was scheduled on 28th Feb 2021. Unfortunately I got a message from Air Asia that the flight is cancelled for all passengers. So they have initiated a refund for the same. Then I informed Goibibo, though I don't know why I had to inform them. They should have informed me regarding the cancellation of the flight. Then they checked with Air Asia and charged a service fee ( I don't know why? Because the harrasment was faced by me. I had planned everything. I did not recieve any service from Goibibo, I had to inform them about the cancellation.) Then Goibibo informed me that they have initiated the refund on 26th Jan 2021. It was mentioned that the refund will reflect in my account within 29th January 2021.
Today is 31st January 2021 and still no sign of the refund. The refund has not reflected in my account. Goibibo is showing that the refund has failed due to refund transaction failure. I want my refund as soon as possible.