MakeMyTrip India — air ticket refund travel voucher not received

I had booked domestic flight for travelling from tvm-del in airindia on 7th april 2020. Also international flight for travelling from delhi-london via doha on 13th april 2020.
I received message from make my trip that the flights are cancelled due covid19 and they will provide future travel vouchers, but they have not provide any vouchers nor they refunded the amount