I assume that you do not have coverage. Get three estimates to repair and then get it fixed. You can file in small claims for the damage plus loss of use and costs. You will need a witness, pictures, the estimates and cancelled check. Many insurance companies, especially State Farm in my personal experience, are denying claims and forcing you to either give up or go to court.
Small claims is very easy and you should be able to handle this yourself. Forms and instructions are online at
http://www.courtinfo.ca.gov/selfhelp/smallclaims

