Sony India — Xperia phone problem

Address:	Mumbai City, Maharashtra
Website:	support.sonymobile.com

I have an xperia z2. It has various problems: display yellowish, white dots on screen, camera quality, camera lens anti glare coating removed, battery backup less, phone overheat. i have given it to service since 3-4 months. the keep sending the phone to company for repairs. but the problem has not yet been resolved. i have not used the phone since 3-4 months and the company is not ready to repair or replace. i am fed up of this attitude and these problems are from the start i.e. manufacturing defect. i need a replacement as the whole of the phone is giving problems the have sent it to repairs many times and the say they have replaced motherboard, etc but there is no improvement. I want the phone replaced. Also i haven't been able to use it since many months and the phone is now outdated without using it. it has been a waste of time and money and accessibility and usability. it has caused me to be without phone for a long time thus unable to work, etc... i would like to appeal for a newer model... please help.