Nokia / 6300 — nokia servicing

dear sir,
i am purchesed nokia 6300 on[protected] my nokia set has a one problem of NO OUTING AUDIO
this problem is come 5 times from the purchase 1 time[protected], 2 time[protected], 3 time12-10-07
4 time 27-2-08 and 5 time[protected] on last time jab mein apna head set nokia care mein diya tha wo working cond. mein tha par after one month service centre say set is not irrepairable & dead due to some problem.
service centre says set thik nahi ho shakta hai jab mera set warrenty mein hai to nokia usse change kar ke de
plz take some action on it

thanks & regrads
nitin bansal
[protected]