Nokia n 79
Service is not satisfactory

I purchased a Nokia N79 cellphone in August. In a year i have given my phone to Nokia Service centre located at Malviya Nagar, New delhi twice due to hanging problem in cell phone, but issue has been not resolved yet and the problem is still there. I am not satisfy with Nokia cell phones services. Kindly provide the solution ASAP otherwise i will never suggest anyone to go for a Nokia Cell phones.