HappyEasyGo — Booking canceled but money not refunded

Website: Happyeasygo
Source: Patna
Destination: Mumbai
Ticket Number:[protected]
Date: 30th April, 2020
Reason: Return to my home city from a family function
Refund Status: Not done

Happyeasygo is asking me to bring a letter from Airline and Airline is saying that they can't provide any letter as flight was cancelled. I have sent them all the details and links to DGCA and AirIndia notice for related to refunds to be issued.
DGCA circular on Supreme court decision - dated 16/10/2020
https://dgca.gov.in/digigov-portal/Upload?flag=iframeAttachView&attachId=[protec...⇄
DGCA Circular on Supreme court decision - dated 07/10/2020
https://dgca.gov.in/digigov-portal/Upload?flag=iframeAttachView&attachId=[protec...⇄
Air India memorandum
http://www.airindia.in/images/pdf/As-per-office-memorandum-received-from-Ministr...⇄