You can sue your realtor for misrepresentation and possible double dealing and file a complaint with the state licensing board. As to your check, contact your bank and have it reverse citing theft. Indicate that your check was to be held depending on whether you would sign a lease and since you didn't sign, the landlord essentially stole your funds. Then call the police and file a police report, as well. You can probably call the police report first and then submit that with your bank dispute.