Axis Bank — Amount not refunded

Address:

411013

I had transferred an amount of Rs 15000/- to another account on April 30th (Saturday). Due to some reasons, the transaction was not successful, but the amount was deducted from the account. When i called the customer service, they informed that the amount would be refunded withing 2 working days.
I also have a mail from the customer service stating that the amount would be refunded.
Its been 3 days, the amount has not be returned. When called the customer service, they are stating that they would raise a Complaint and then put the call on hold for another 10mins. No response received from them yet.