Indian Bank — refund is not credited till now

Address:

Anantapur, Andhra Pradesh, 515001

Hello
I ordered two items in amazon, i made a payment through debit card i. E, 820 rs/-
Due to some problem the order was cancelled and processed the refund. But it was not credited to my account.
It's very bad that u take lot of time to initiate the refund amount to our account.
I was waiting from 15 days but no response from u.
Pls try to solve my problem as early as possible