Sony India — hanging problem :/

Address:

New Delhi, Delhi

phone using: sony experia L date of purchase: 14-03-14 -since i have bought the phone it is giving me silly problems like hanging. sometimes when the call comes then the icon for accepting the call doesn't comes and if by chance the icon comes and the call is attended then the icon for ending the call disappears. i am totally fed up with the services of sony india. when i have given my phone to the service centre then they said that the problem will not appear again but its wasn't became true, the problem is appearing again and again, they just have returned my phone back by updating the software. i'll never recommend sony ever in my life till me problem is not been solved.