My xiaomi phone ( Redmi note 2) is not taking charge.

Hi everyone,

My problem is that, i have just bought a Redmi Note 2 online. For the first three weeks the mobile was ok, but later this week the xiaomi phone is not taking charge. I have changed the battery twice , i have even change the adapter and the USB cable, but the item is not taking charge at all. What should i do, or what is the problem.

Thanks in advanced.