Help24 does the absolute opposite of "help"...

A "Help"24 driver came up behind me, speeding and flashing me out the way. As I was in the right lane, I indicated to go left, and moved over. He was coming up so fast, he didn't even give me a chance to move over. I assumed he must be in a hurry due to an emergency, but when he drove past, he slowed down, and the passenger started swearing at me. I was doing the speed limit, possibly a few km's over even, so it was uncalled for. The passenger then picked up something in the truck and threw it out the window, straight at me. I didn't see what it was, but I heard it hit my car. I was absolutely horrified (and still am). Afterwards they didn't even speed off again, so there was clearly no emergency. I feel I should take this further. I did not get the license plate, but there was a number on the vehicle - ********** . It appears to be the personal number of the driver. How an entity that is supposed to "help" people can carry on in such a way makes me sick.