someone hit my car, but his insurance company will not provide me with his information what do I do to file a claim

Unfortunately, the other driver's insurance company is not obligated to give you any information and they can process the claim as slowly as their internal guidelines will allow. Even worse, if their insured does not return their call, or otherwise does not "cooperate" with their investigation, they can deny coverage completely.

The best thing that you can do for your property damage claim is to keep calling and/or writing the insurance company regarding. Many times in these situations, it is the squeaky wheel that gets the grease. If you are injured, you should seek medical treatment and hire a lawyer to help with that claim.

Good luck.