Amazon India — refund amount is not credited in to my account

I have requested for refund but the refund is not processed for the order no the item is[protected] and amount is 506. The costumer executive not solving my issues and said its you problem we have no responsibility of this. Amazon representative told me that we cant do anything for this refund we already refunded your amount but it is not reflected in to my account and they told me that your refund is initiated on 16th of august but still i have not received it.