Our vehicle was stationary on the side of the road due to flat tyre. Our friend's car was behind us with hazard lights flashing. A triton ute with a trailer carrying a car hit the friends car behind us which in turn pushed it into the rear of our vehicle then also hit the side of our vehicle as it went past. The diver of the triton ute was not the owner but the owner was there as a passenger in her vehicle. We have $10,380.00 of damages done to our car. We have been told by her car insurance company that they have rejected all claims for damages. My question is who is liable and responsible for payment for these damages and how do we go about starting a claim process against this person for the car accident? Thank you.