Karur Vysya Bank — Money is not refunded

As i have cancelled my order in amazon, my money is said to be refunded in my bank account.. but i have not credited any amount in my bank.. the refund reference id is 30005402990297139989606
the refund process is said to be initiated by 25th october so my refund should be reflected in my bank account within 2nd nov, but it is not refunded till date
kindly do the needful ...