GoAir — refund not received on cancelled flight

I had booked a flight ticket for my wife, geetha p, by goair flight g8-381 from goa to mumbai on 11 may 2017 (Pnr no. Icau75). Booking was done through travel agents, m/s balmerlawrie. The flight was cancelled and received an advice from goair authorising for full refund. However, the refund amount not yet received from the travel agents even after three months. Upon contacting balmerlaurie, they informed that they have not got the refund from goair. No reply received to my mails to nodal agency as well as appallate authority of goair. Amount to be refunded was rs.4242/- it is requested that goair may be impressed upon to credit the refund to balmerlawrie, who can the make the refund to my account. Regards, anil kumar s