Indian Bank — regarding refund- refund not processed

I am soundarya. I ordered some books on amazon and i cancelled the order and initiated for refund. The amound is Rs.770. Still i didnt get the refund from amazon which they processed on 25th may2019. The mail from amazon picturized that i
will get the refund by 30th may2019(within 5 working days). And now its almost 10 days. The Authorization Code (Refund Reference Number) for the transaction is[protected]. Please process the refund as soon as possible