Vistara Airlines — Auto cancellation of flight by vistara : refund not received

Website:

Airvistara.com

I have booked flight for bangalor to kolkata on uk-838. Vista airlines cancelled the flight due there service issue. They also promised that they will fully refund the booking money. But they hv not done. 1 month is over since cancelation msg i hv received from vistara. I booked through smarbuy - goibibo service. Now all these company are blaming vis-vis.
I hv called many times to smartbye, goibibo, vistara customer care but still now i have not received the refund. It is really pathetic service. I should not booked using smartbye or using goibibo or vistara flight.