How do we get this insurance co. out of business? ...

How do we get this insurance co. out of business? Their insured ran a red light totaled my truck, forced me into the car next to me and all occurred 4/30/2015. My insurance Allstate handled all my financial problems except for a rental car and after police reports clearly blaming their insured and many attempts on my part to get through to someone with this fraud of an insurance co. and absolutely no success, a letter from them 9/19, claiming that their insured is not at fault and they are denying everything!
They have the audacity to suggest that if I have any information that might change their decision, please call. Like you could get through to anyone, I've tried and with absolutely no success ever!!