Could they not have been lowering food and water down to him on strings etc? I suppose not if he's unconscious, and/or not directly down the hole?
The hole is partially blocked with earth that fell after the child, they couldn't get a camera down to see the child, so they couldn't have got any food down.
It's quite likely now that after twelve days, he'll be in a state of coma anyway, if he didn't hurt himself when he fell.