Sorry,
I was confusing your question with a previous thread.
So we dont waste more time here, describe the screw. Is it flat or round head? Does the head protrude enough to grab it with something or cut a slot in it? If you remove the head, can you remove whatever it holds on, then see enough screw to grab hold of?
If you can find someone with a hand impact driver who knows how to use it, do that.
Ron