Indigo Airlines — cancelled flight refund

Address:

INDIA

I have a one-way flight ticket for myself and a friend to london which the airline cancelled.
Pnr: nfft6f.
E-ticket:[protected]
Pnr: surmi8.
E-ticket:[protected]
These tickets were bought on 19th may for a flight on 4th june and were all along confirmed flights by indigo.
On 30th may indigo writes to inform that the flight is cancelled. The booking breakdown total in the itinerary was stated as 46, 624 inr, but after they cancelled the flight they stated the value is now 34, 624 inr in a credit shell. I have no reason to hold any credit shell with indigo. I want my refund and am not given any option to pursue it except a phone number which is either not answered or cuts off as soon as you start talking to some one. Really sad to be treated this way. I have bought a repatriation flight ticket to return to the uk.
If there is decency in business, it is to be seen by how some companies are allowed to take advantage of people, especially vulnerable ones.
Thank you very much for any effort towards this issue.
Yours,
Sincerely,

[protected]@yahoo.co. Uk