Amazon India — non receipt of refund amount

Address:

Hyderabad, Andhra Pradesh, 500016

I have paid the full money to words purchase of an item on line titled " an introduction to hindi grammer by author jain and sold by amazon export sales llc and by courier aramex with tracking number [protected]. So far, the book was not delivered and i received a message on 16 th october, 2017 that my refund amount of rs 2900.82 has been processed and refund sent to my debit card account and will be credited by 14 th october, 2017. So far i have not received the amount.