Coolpix s9300 will not come on it seams to be charging

Are you using the Nikon charger or a substitute ?

Use the factory reset procedure, or take the batteries out for a few minutes. This will reset the camera and it should be okay.

While charging, did the charger act normal? on the end the light was burning continue?
If so we have to assume the battery os charged. Then check the contacts on the battery and in the camera. They should be clean and shiny. Not coming on means not even the lens barrel moves an inch and you can't view pictures on the card and you can't change the menu.
It should really be the battery. Also make sure you did close the battery cover, because there is a little switch, checking if the door is closed. The camera won't start if it is not closed correct.
Last I hope you did not manage to revers the battery.

Try firmware update:
http://www.dslrphoto.com/dslr/nikon-releases-firmware-11-for-s9300-camera-fix-rare-freezing-issue,30321.html

http://www.dslrphoto.com/dslr/nikon-releases-firmware-11-for-s9300-camera-fix-rare-freezing-issue,30321.html
Try update the camera firmware.

Try the procedures in this tip.

Press the MENU button. Select the wrench icon. Select "Sound settings". Select "Start-up sounds". Select "Off"