How do you get an insurance company to return your call after a wreck with their insured?

Document each call you make - date, time and person called. Leave a message for that person, giving your name, the date and a phone number where you can be reached. Most ins. cos. have a menu option - choose x number to report a new claim. Make sure you're doing that. If you still don't get a call back, ask the company's operator to put you through to the claims department supervisor. If you still don't get anywhere, call your state's department of commerce which generally oversees insurance companies and claims practices.