Shoppersstop.com — re the refund that I didn't get in last 6 months

This is the re the order id order id[protected]. After placing order i got to know that product was out of stock. They sent a mail that they will refund, to which i said please check for alternate product. I didn't receive either the shipment or the refund. Followed up multiple time. A few time they mentioned that amount will be refunded, still i didn't get. Transaction amount is 1645.
My registered id is raghwendra. [protected]@gmail.com
Phone no: [protected]