Kerala Gramin Bank — Amazon Refund not reflected in bank account

I had done an online purchase at amazon.in on[protected] and paid an amount of 399/- (THREE HUNDRED AND NINTY NINE ONLY) through my Debit card :No: [protected] .But on next day I returned the product and requested for refund, as per this they processed my refund on[protected] for an amount of Rs.399 ( THREE HUNDRED AND NINTY NINE ONLY) to my original payment method, ie to my debit card, but till now this amount is not credited to my account, I am quoting the refund payment reference number received from www.amazon.in. Please do needful.

RRN : SAJA27VJ0000KS7Q371Q