Indigo Airlines — request a refund

I have booked tickets twice with indigo, one is on 24th march, name of akash das, and the other one is on 15th april, name of sourav mondal, but both the times they cancelled their flights because of corona virus outbreak. Now indigo refused to get refund our ticket amounts to my source account instead of they are providing the balance in a form of credit shell which we can use it for later journey within one year for the same passengers.in this situation we don't have any plan to journey within one year, so i want my money back into my account. I have tried to reach indigo's customer support but in vain, they didn't provide any suitable answer. So i want to file a complaint against indigo to refund my full amount of money to my source account.