My partner and I had just purchased a late model used car and on the second day we had the car another car crashed into it while it was parked. Whilst there is no disputing the fault of the other driver causing the car accident, my car insurance in not covering the total cost of the car and we are left out of pocket. I have spoken to the driver of the other car who I am told by my insurer is responsible for the remaining costs. He is refusing to pay these costs and I need to know what to do to them this back from him? Thank you.