Aakash ubislate 7+ not received

Ihave booked 15-02-2012 one aakash tablet with booking ID pme88eb5d38b, the cheque is also send as on 1st march 012, the cheque details are shown below cheque no. 6530 bank name : state bank of india, cheque date : 012. Bank address: state bank of india, kothapet, vinukonda - 647, guntur district, andhra pradesh (the cheque status shows that it is paid to datawind). I have send message to @datawind.Com and they asked me the details of the cheque, after giving the reply I have not received any reply, then I contact at 1800 180 180, they asked me to send the details to @datawind.Com it is irresponsible to the data wind ltd. I am calling the so many times. It is not proper answering, preset number is changing. I humbly request you to kindly let me know the status of my pc. Thanks & regards suresh palvadi 840.