Air India — refund not received

Hi.. This is regarding my ticket booked with air india for flight scheduled for aug 26 from kochi to mumbai. It has been a month since the flight was cancelled and i still haven't recieved my refund. I have emailed [protected]@airindia.in on sept 5 regarding my refund but still have not recieved any response from them. The customer care stated that the refund would be recieved in 15 working days. But it has been more than 15 working days now and i still haven't recieved it
Air india has not done anything to initmate the customer regarding the refund.. You have taken my money and not ready to give it back