Nokia / N72 — complaint of nokia care service

sir/madam

I am Kundan Singh, had a phone n72 which was out of warranty, my phone got some problem of virus, i contacted to nokia care centre at Shadipur Depot on 9/01/09 they told me that your phone has booting problem because your handset has got affected by virus and has affected your hardware components thereafter they made a job sheet which has no:[protected]/090109/15, the expected delivery date was 10/01/09, they told me that the estimated cost will be Rs 800, the imei no is :[protected], actually i had some hectic shedule so i went to service centre after one month on 10/02/09 after one month also they asked me that you will get your handset on 12/02/09.
so now i am so upset with the service of nokia care, now i want to sue against the nokia care, sir/madam now i want to know that am i applicable to sue against nokia care which kind of compensation i will get in against of this case and kindly tell me the procedure to go ahead.

Thanking you
kundan