I would contact the police and let them know the insurance information provided is invalid. Give them all the information you have available to you; the other driver's license plate, police report, all photos of the incident, etc. Next, I would contact your insurance company and let them know what is going on. Your insurance company will be on your side. If you have uninsured coverage
on your current plan, you can have the damages repaired through this coverage until the other party can compensate your insurance company for the damage.