Indian Bank — refund processed but not credited

Address:

No.43 Muthuvel layout k.k.road nearby Achariya school Villupuram

I order mobile recharge for my airtel number( [protected])using Amazon app using my Indian bank debit card (my a/c number[protected] Villupuram brach name: Yamunarani) is but it was failed and got the message that it will be refund. I got a mail from Amazon that the refund was processed.still the amount was not credited in my account when i checked with Amazon they told the refund was done from their end so they advised me to contact the Indian bank