Nokia 6500 - C — Hanging Problem

My Cell phone Model :-Nokia 6500-C is getting hanged whenever i try to use Memory Card, i have already made complaint to my Dealer Ajay Electronics from which i have purchased on 01 January 2008 Bill No:-2409. My complaint is still pending on his desk since from last 45 days and no action has being taken on this complaint. Handset is already surrender at his desk at the time of complaint. Details of my Handset are as follows
Model :- Nokia 6500-C
Serial No :- [protected]
Battery No :- 39321374812102521660670509
Charger No :[protected].0675606
Bill Named :- Mr Santosh Rai
Bill No :- 2409
Dated :- 01/01/2008
Contact Person at Dealer : - Ajay Shukla
Dealer Ph :[protected]
Address :- Ajay Electronics
20, Indira Gandhi Market, Yavatmal -445001 (Maharashtra)

I hereby request you to take necessary action of this complaint as early as possible, Please free to call me on my Cell no.:-[protected] for any query. Thanking You -Santosh Rai