Indian Overseas Bank — Refund of rs.7490/- not getting from the bank

Address:

600040

On 11th feb 2017, i used my iob visa debit card for the transaction of rs.7490/- in the flipkart mobile app. On 14 feb 2017 i cancelled this item and on the same day (14 feb 17 01:23:54 pm) flipkart initiated the refund of rs.7490/- to the original source account. (I. E., to my iob visa debit card). But, the amount has not yet been credited back to my bank account.
Refund reference number provided by flipkart: 74766517045706413115941