Samsung Galaxy S3 Mini does not charge and does not start

A

AC Question

Hello! Recently my phone's battery has been dying really fast. Last time I charged my phone, it turned itself off, after pressing the turn on button for the second time, it worked and it was fully charged.
Today the battery was about to die, i plugged the charger in. It didn't charge and the phone turned off.

It used to vibrate when i plugged it in. There were a few times i saw the opening animation with Samsung logo but it didn't start after that. A few times there was "waiting" sign but it was not moving and nothing was happening. That sign constantly appeared when it was connected to the charger for a few times then disappeared. The rest of the times it just vibrated and nothing happened. Now, it does not even vibrate, it is completely dead.

I have two chargers, tried them both.

What should I do now?
Thanks!