Samsung Gtc5010 — poor performance even after repairing many times

Address:

Haryana

I am parth gaur of sonepat(haryana).
i lodged a complaint few day back about my Samsung gtc5010 in which i asked Samsung to exchange my this handset with some other model coz this handset model is not working properly,but they said "now problem will not occur" in my handset and repaired it and i got my handset after repairing on 23rd july2011 and now from yesterday the same problem has raised and my phone is creating problem and booting unnecessarily. i have visited Samsung service center 1aroung 13 times from the date of purchase of my gtc5010 i.e 9 months and i m fed up of all this and request to solve my problem fully and exchang my handset with some other model of the same cost as of my gtc5010.