Akbar Travels — refund of flight cancellation amount

I had done a booking through akbaar travels for kolkata to copenhagen via delhi with airindia, due to covid-19, airlines cancelled the entire journey, even lockdowned their airlines. Akbaar travel also confirmed full refund. But now have mailed them twice, they are not even bothered to reply.

Akbar travels promised to refund full booking amount within 15 working days. Now its almost a month did not get the refund nor they are replying to my continous email.
The travel was cancelled by airindia itself.

Journey date - 28/3/2020
Pnr - yzn80