Indigo Airlines — My bank account got debited but ticket wasn't booked

Address: Kolkata, West Bengal, 700015

I was trying to book a ticket from kolkata to Raipur on 23/05/2017.my bank account got debited however the ticket wasn't booked.later the ticket for the required flight wasn't available. The refund of the incomplete booking was not received. I had called the customercare and expressed my requirement and explained the issue. They had promised that I would receive a call 2 hours later and be apprised of the latest status. I had received no call later. This I find highly unprofessional is an airliner which speaks of to of the class customer service.