Flashstar Commerce — Delivering Defective product... Don't buy product from this area

I have ordered a mobile in which the power on/off port was not working. At the time of open delivery, it seems good but by the evening it's port seems lose and then it startin shut down whenever I press the button. Then I register the compain and they said that they will resolve the complain within 5 working days but at the 5th day they said that we can't solve it and you have to go to service centre... It's genuine and don't buy product from this area...