[Resolved]  Nokia 6300 — Defective instrument / replacement

Dear sir,
I have purcheshed nokia handset 6300 (IMEI NO.is [protected]) on 15/03/2008 from your Nokia priority dealer in bapunagar ahmedabad 380024(INVIOCENO.RT/9965). On that same day when i went to home with mobile within half hour it was hung, any key not responded. On the second day i went to dealer they advised me for formet memory card and phone. I did same thing from Nokia care center in bapunagar. They gave me job sheet and formet my M.C. and phone. I thinked my problem has been solved but i was wrong. It was unsolved. this problem has been created 5 times after that and they (member of care center) formet my m.c. and phone. Last two times they told me yr instrument has to send to Delhi for sollution of your problem. On 26/03/2008 they took my handset and gave me job sheet no.[protected]/080326/77. After that i recieved my handset on 04/04/2008 but when i went to office with my handset i was socked. problem was continuing. I afraided my handset had not sent to Delhi. I immidietly went to care center. they told me your handset has to send Delhi again and gave me job sheet no.[protected]/080404/14 on 04/04/2008. Also it's battery is not working properly. After full charg it lows down in just recieve 3/4 calls. when it hangs keys not working i have to remove it's battery to switch it. Somwtimes its memory card does not appear in menu. I have to switch off it and again on it to see memor card. So give me proper sollution for my product. or give replacemen of it.