NIIT — Voucher stolen

Address:

Bangalore, Karnataka

I bought a ITIL V3 Prometric voucher from NIIT Kormangle branch on 26th Dec 2009. When i went to appear for the exam on 22nd Dec 2010 (2 days before the expiry of the voucher), I was told that the voucher is already been used. I was asked to immediately send a scanned copy of the payment receipt and voucher details so that they could find out how adn where the voucher was used.Inspite of repeated follow up I was not provided with a answer for 3 weeks which made me suspicious. FInally I contacted prometric directly was told that the voucher was used on 14th Dec 2010. This was very suspicious as the voucher was misused only 10 days before the exiry period. I have been following up with NIIT Kormangla Branch manager for the last two months but inspite of so many emails they have not responded to any of my queries.
Can someone let me know if I can lodge a FIR against the theft or shuld I approach the consumer court as I stillhave the voucer and the payment receipt with me?
Any suggestions are welcome. My email id is sharma.[protected]@gmail.com