Hp Redemption — Didnt get the offer gift

I bought my HP DV5 2918-TX Laptop on 19th december 2008, and according to HP rules there is a home theatre of Philips 5.1 with the Laptop by a payment of Rs.1499. I send them the Demand Draft and other details on 30th December 2008. Bt today till 7th October 2009 , I didnt received my Gift. I call them many times but they told me that they will send it within 20 days, but the wait is now beyond the bearable time.