Device not been delivered Inspite of Full pament by Demand Draft.

Location/place: Patna Bihar

Name of company/service: Datawind

I have sent the Demand Draft which they have received a long way back. I had booked my device in January 2012 and they had promised me that it will be delivered by September.I have all the conversation saved in my email id.
My booking ID is PMAD73489DE.