Samsung India — A7 mobile phone, repairs 4 times in last 11 months

Address:

Ludhiana, Punjab, 142021

I bought a samsung a7 mobile imei no 359038/06/130761/4 from sachin gift gallery, model town ext, ludhiana on 7th june 2015. The same has been repaired for overheating/network and other problems 3 times in the last 11 months, in which its mother board was changed thrice. Now for the fourth time, the phone is under repair for sound problem. It still is under full warranty. I don't trust the device anymore and want a replacement or full amount compensation for the same.