My mobile doesn't turn on.

I had connected my mobile (Samsung Galaxy Note 3 neo) with music system on eve of 15 august and when disconnected after some time it was off and since then it doesn't reboot. I have tried to recharge battery, tried to reboot but nothing works. could anyone please let me know what would be the better solution. If i need to visit Samsung galary kindly share address and contact details available nearby kurla west.

Thanks in advance,

Rajesh varma