Wow, you don't have much luck. Glad to hear they were insured though.
My ex husband was in a crash a few months ago. He was right at the front of a line of 6 cars who had all been pushed into each other from one guy at the back, who then drove off. He was so far in front he had no idea what was going on back there. Apparently the car who hit him, their insurance won't pay out as they say the fault here is 100% with the person who caused the accident, not anyone who had stopped too close. And nobody has the rego of the car who drove off. His car wasn't worth a huge amount so was only insured 3rd party property, and comminsure who he is with wouldn't even give him advice on what he could do.