Indigo Airlines — Not providing my refund

Address:	788109
Website:	www.goindigo.in

I was booking my friends flight online on 19th jan 2017.error while payment.payment of RS.2322 made but booking could not have been made.still waiting for my refund. Called many times indigo but no help. They are saying that we have done refund but bank is cancelling it. Complaint no. RH5K2U.tell me some way to get my money back.
19th jan at 0905am. Ram nautial name of passenger. Txn ID-HU-[protected].