Indigo Airlines — received no refund for zero cancellation ticket

I had booked tickets from bhubaneshwar to bangalore on 11th april 20 on indigo 6e 431 scheduled at 20:50 with the booking id if[protected] through ixigo with zero cancellation fee and the return ticket from bangalore to bhubaneshwar on 26th april on indigo 6e 411 scheduled at 15:20 with booking id if[protected]. The total amount paid for both ways is rs 15, 602.

Due to covid issue, i cancelled the flight and i have received a refund of rs 1, 121 only. Despite of calling and reaching out to ixigo, they are not picking the phone and over chat suggesting to reach out to indigo. When reached out to indigo via chat support - they are not refunding the money, rather asking to reserve the booking for future.