Iphone won't charge, charging not supported with this accessory

I havent updated my phone to the latest software yet, so need to do it, this may help the issue of it not charging, i dont think the battery is dead because it was working but saying CHARGING IS NOT SUPPORTED WITH THIS ACCESSORY even when i tried the mains charger, car charger and from a pc however I cant do this because my phones battery has now died...anyone help ?