Inspiron N5010 — replace my laptop

Address:

Bathinda, Punjab

Dear sir/Madam,
I have to complain about my laptop. So i have become totally disappointed with laptop and with the service from Dell Service Centre. Here i m describing my all situations...
I bought my laptop from DELL INDIA PVT. LTD. by making an order online and they delivered it at my diclared destination on 05/06/2011. Till 20 days, i operated it perfectly but after it, a technical problem occured in my laptop (PROBLEM: computer not work properly. In the end of the may, i complaint to the DELL TECHNICAL SUPPORT about the technical problem and i asked them to replace it but they said that after diagnosting, we will take action and finally they decided to change mother board&dc card.. An engineer came from dell centre on 10/06/2011 and changed HD of my laptop. But after one week i still had the same problem again with my laptop and there was no satisfaction at all. During this session, i was preparing my exams so i had a lots of problem and i couldn't study at all. Now again i tried to call to the DELL TECHNICALL SUPPORT to complain and they were disconnecting my call so many times. But finally a person handle my call and i told my all situations again, i said again that person to replace my laptop but he denied and said "your laptop could be replaced within one month from the due date." (here i want to clarify to you that i m not responsible because in the fist complain i had already told them to replace my laptop.) and regarding the second complain, they changed the mother board and dc card of my laptop on 11/06/2011. But after the next three days, still the same problem occured with my laptop. now it was beyond the extreme limit of my patience. after this third event, i didn't make a call to the DELL TECHNICAL SUPPORT due to my refinery work. so now, i think that there is no benefit to call dell service centre. because the duplicate or refebrised part install in my laptop.
So this is all about my situation. Now i request you to take an action against this problem and i want my laptop replaced any how.

I am giving all details below.

company name: DELL INDIA PVT. LTD.
Registered Office:
Divyashree Greens,Ground Floor,
12/1,12/2A,13/1A,Challaghatta Village,
Varthur Hobli,Bangalore South,
Karnataka.
website: www.dell.co.in
Company Tin No.: [protected]
my laptop service tag nos.3xvl6q1
mob, nos_[protected]