Nokia — Reg. Replacement of Handset

I have purchased Nokia N70 (Music Edition) in the month of July 2007. I have shown this problem in Nokia Customer Care in sector 22 Chandigarh. They have done it and after two months same problem is there again and again. I have given the complaint of Memory card and at that they have formatted the memory card and given back to me saying this memory card is OK. After few days the same problem was there in the warranty period but they have not changed it. I have asked customer care of Nokia also and they told me that the problem will be solved soon.
And I have faced the problem of opening yahoo messenger. It is due to the old version of the software and needs to be updated and i have given it to Nokia Care in Sector 11, Panchkula for updation of the software but they have just restored my phone and given it back to me saying we have formatted the phone. I have reached the hutch care about the problem and they told me that the softwares of your handset needs to be upgraded. I have given again to Nokia Sector 11, Panchkula and after 5 times of submitting it to them the problem remains same..
Nokia Sector 11 persons behavior with the customers is rude and not upto the mark.
I have taked to Mr Malkiat Singh of Nokia. He assured me to give the solution within 10 days. but after 10 days also the problem remains same. and no solution was provided till date. I asked them to replace the handset but they told me that it is a software problem, so we can't replace the handset.
I talked to Mr. Manjit Banwait (Head of Nokia Care, Sector 22) who has given the reply that please visit nokia sector 11 only. and they cant do any thing since the handset has already been registered by them only.
I also talked to Mr. Kalsi (who is heading Punjab area) and Mr. Vikram (Head of Nokia Care in Panchkula). I have sent so many emails also but all in vain.

Hope for positive reply at the earliest.

Ram Ashish
# 21, Harmilap Nagar
Baltana, Zirakpur
Mohali - 140604
Punjab
INDIA
Ph. [protected]