Samsung India — To repair my galaxy j7 mobile phone

Address:	Gautam Buddh Nagar, Uttar Pradesh, 148108
Website:	www.Samsung .com/in/support

I bought a galaxy j7 mobile phone having code 356273.07.066824.2 on 18 Dec 2015 it was running well but after the continuity of six month it showed sudden black out while I was watching videos then I surprised to see that then I put it switch on again and did not show any problem for next one week then it goes out permanently and I accessed care center they did not give any satisfactory reason for black out even there was not any breakage on screen but they blamed it was damage of screen I m not satisfied with this type of service please help me as soon as possible even I have five months warranty left