I highly recommend trying to clear this up with the Credit Reporting Agencies (CRAs) like Experian, Equifax, Trans Union, et al. If they fail to do so, you may have valuable claims against them ESPECIALLY if your credit has been damaged. Usually, a police report is a good place to start. I recommend Robert Stempler, Bob Brennan or Stephanie Tatar in Southern CA for this kind of work. Please tell them I said hello. You can find either of them or someone else good in the national database for experienced consumer protection attorneys at the "find an attorney" tab, here:
I agree that filing a police report is a good place to start. You should also place a fraud alert and notify all credit reporting agencies Experian, Equifax, Trans Union of the identity theft. Good luck.