Jet Airways — refund after flight cancelation

Hello!

My name is joao fernandes. I am from portugal.

On october 16, 2018, i bought three return tickets between lisbon (Portugal) and goa (India).
Tickets were bought from a travel agency for 695 euros each (Approx. 54930 rupees each).
The agency bought the flights to jet airways.

The outward journey was on 10 april 2019.
The return trip was scheduled for april 24, 2019.

With the end of jet airways operations, on april 17, 2019, we had to buy new tickets to return to portugal and only the return route costed the amount of 66710 rupees (Aprox. 850 euros each) each.

After the april 17 event, we completed the online form on the jet airways website for money back claims for canceled flights.
On april 24, we received emails from jet airways, informing about the “disruption assistance : goa - mumbai - paris - lisbon - 24 apr 2019 - neyber - request for refund” and the “disruption assistance : goa - mumbai - paris - lisbon - 06 may 2019 - mtuazi - request for refund” with the following messages:
“please accept our sincere apologies for the inconvenience caused to you due to the flight cancellation.
With regards to your email, please note cancellation or refund have to be processed through the source through where the ticket is booked.
We have updated necessary remarks for your agent to honour a full refund. Also please note this mail can be considered as a waiver authority and request you to kindly get in touch with your travel portal team or your travel agent for the refund.”

Meanwhile, the travel agency informed us that “your refunds have been requested to jet airways and we await a response. As soon as there is news we report.”

We are still waiting for the money devolution, which should normally take place within 7 to 10 business days after the order.
What can we do more?
Do iata and / or icao intervene in these cases?
And the indian national air transport regulator, which is dgca?
Is it possible to file a formal complaint with the dgca (Directorate general of civil aviation, government of india) and / or some other national consumer helpline institution of india? Which ones you recommend?

Information on canceled flights due to the termination of jet airways operations:

Passengers: mr. Joao fernandes and mrs. Graca costa (Pnr is neyber) and mrs. Luisa costa (Pnr is mtuazi)

Route: goa - mumbai - paris - lisbon

Flights
Passengers joao fernandes and graca costa (Neyber code pnr):
Flight 9w 496 from goa (24 april 06:55) to mumbai (08:10)
Flight 9w 124 from mumbai (25 april 02:05) to paris (08:15)
Flight 9w 4985 from paris (25 april 13:05) to lisbon (14:45) operated by joon

Passenger luisa costa (Mtuazi code pnr):
Flight 9w 445 from goa (06 may 18:40) to mumbai (20:10)
Flight 9w 124 from mumbai (07 may 02:05) to paris (08:15)
Flight 9w 4983 from paris (7 may 09:35) to lisbon (11:10) operated by joon

Reservation codes: neyber (Passengers joao fernandes and graca costa); mtuazi (Passenger luisa costa)

Electronic ticket numbers:[protected]Joao fernandes);[protected]Graca costa);[protected]Luisa costa)

Will this complaint be made known to the jet airways services or another entity involved in the resolution of the still absence of refunds?

Thank you.