HappyEasyGo — Full refund pending for past 8 months

I have booked flight of Go Air on[protected] for 5 passengers. But flight got cancelled by airlines. Go Air has refunded full amount to Happy Easygo which they have confirmed through mail.
But happyeasygo is claiming that they have not received full payment till now.
They are offering me 2000/- refund but actually my refund amount is around 20, 000/-.
Everytime i call or mail them they ask to wait for 7 days.
Please do the needful.
Trip ID:[protected]