ShoppersStop — Refund money as order cancelled (they don't have product in store)

I have purchase online a product from Shoppersstop ONLINE on 12th of August. my order number is 5025565. But the order was cancelled later by them as the product was not available with them. But they havenot yet refunded my amount. I kept follwing through mails and calling customer care of shoppersstop but everytime they have the same answer that it will be refunded within a week but it is not yet done