Indigo Airlines — Amount deducted twice but not refunded back

Address: Mumbai City, Maharashtra

I paid the fee for rescheduling my flight as I missed the same on 3rd July, 2015 from Mumbai to BBSR. I did pay 1200 INR cash and 2127 INR through Card. First time the transaction was unsuccessful, followed by a successful one. But my account got Debited twice. When informed about the same to the airline person, she told that the amount will be refunded back to my card. But Still I didn't receive the amount. kindly look into this.