iPhone charging issue

First things first, try plugging it into your laptop. You'd be surprised how often that works. Also, double-check the wall outlet isn't dead. Also, I hope you're using the apple certified charger and cable? If you're still having trouble, better to contact Apple Authorized Service Center. Also, if happen to have protect+, it could help save you money on repairs.

Bad charger or possibly a bad cable.

Hello! Have you tried using a different power outlet?