Nokia N8 — phone doesn't switch on..

Address:

Nagaon, Assam

i m very sorry to inform that i brought a nokia n8 3 months back and for the last i and 1/2 month i m facing problems as the phone hangs a lot and when i switch it off it dosent start ,i even tried to charge it but still it wouldn't start .so i gave it to a nokia care centre and got my n8 15 days back , it worked properly for few days and i faced again the same problem so again gave it to the nokia care centre in guwahati.but truly speaking i m frustated with the response i m getting.the nokia care centre people are not responding nicely and i m in a fix .so,what should i do ?should i approach the consumer forum or?????? i m in a true fix.....