Damn, sucks that this happened to you. I don't know how it works but it doesn't make sense to me that the company won't take responsibility, it is their truck that rolled into your car after all. Why does it matter who was the driver? If that dumpster is from that company then I assume they'd be responsible, it couldn't be your fault when it's THEIR dumpster that hit your car... Hopefully someone can chime in and help you out.
10' Space Grey e92 335i