HTC — G sensor not working

Address:

Saharanpur, Uttar Pradesh, 247001

I submitted my mobile htc 728in Aligarh (uttar pradesh) service centre for the problem of not working of g sensor. They said it will be deposited for10days..
i deposited but the same problem arise of not working of g - sensor. The problem is very serious to be concerned . No games can be played withouy any sensors like temple run2, asphlat 8 .
plz check my problem or i'll take some serious actions regarding hTc brand name