I need help with my chager.

There are countless possibilities of reasons for this problem. If you could provide some more specific information about the nature of your problem, we can help you better.

For starters though, Try using a different micro USB cable and wall adapter and see if that has any effect.

If it works then the fault was with your old charger. If not, there's a few other things we can try. Just let me know either way and we can go from there.