Your next step is to notify credit reporting agencies, governments, and your creditors (maybe even down to your utilities company) that you have been the victim of identity theft. It is recommended that you speak with the fraud or security department and follow up in writing to the billing department.
It is critical as you contact these organizations to keep good records! It is recommended to keep records of the time and date that you call, the names of people you speak with, and any correspondence you receive regarding your situation.
Regardless of your identity theft situation, contact your bank, creditors, and the three major credit reporting agencies shown below. Another resource is www.annualcreditreport.com