Sony India — problem in new handset

Address:

Jaipur, Rajasthan

i purchased a sony xperia Zultra for RS19000 on 23/11/14. It started creating problem from 3rd day only there was a problem in touch screen, it was working automatically. i complaint to my dealer about this. he told me to go to service center. i gave my phone in sevice center disclosing all the problems. they gave me back my phone after 2 days and told there will be no problem in it now. But from the very next day it started creating same problem.