whos responsible for medical costs? im from Texas and i was in a horrible accident in south africa the driver from the lodge crashed head on.

Visiting South Africa at a lodge for a hunting trip. The driver hit head on and killed 4 people and badly injured both me and a friend. I finally was able to come home and went to the ER this morning and this is my results . i have an infection of my back due to there still being glass inside. they picked out 7 small pieces but on the x-ray showed a significantly larger piece that is under the skin, they couldn’t get too without surgery. but said that with time it’ll push closer to the surface and i can come back and get it removed then. CT of my head went good, definitely have a concussion but no other issues there. CT of my stomach showed somethjng is wrong with my large intestine my wall is very thick, and they said i may have internal bleeding of my stomach but wouldn’t know without a rectal exam which i said no too. so they are sending me to a G.I. specialist for a 3D of my stomach. I have a partial fracture in my pelvis and shifted plates that require several months of PT