cornerstone millwork

Bobby Roper the owner took a $6000. deposit for remodel work and cabinetry to my home. After waiting a year for him to do the work for me I demanded my money back. He and his wife Kim shut off all contact with me. Blocked my calls and messages. I have sent two certified registered letters to them and they would not sign for them. I cannot locate them to press charges. Any help would be greatly appreciated.