Datawind — No refund within the promised time

Address:

Bokaro, Jharkhand

I booked Ubislate 7cz and paid online a sum of Rs 5999. However, after going through the millions of complaints on the net, I cancelled the order and have asked for refund on Dec 09,2012. I sent them all the relevant details- Bank Account number, bank details etc. I got an email from datawind on 12.12.2012 that they will refund within 3 weeks after deducting Rs 500 as cancellation charges.(though the website says that before the delivery of the product entire sum will be refunded).
The 3 week period expired on 02.01.2013. Seeing the predicament of millions of other customers who are facing similar issues, I kept on sending emails asking for refund.
Finally, datawind sent another email on 03.01.2013 that the refund is in process and it will take another 3 weeks to refund the amount. I dont want their product.
Sir, please help me in getting my money back from this fraud company datawind. My booking order number is PM965462F0C8.
Vishal Sinha