Similar thing happened to me i paid 5000.00 up front to have my roof done, after 6 weeks i had to get another company in as they had made such a mess of the roof, refused to give me the 5 grand back, i went to court after about a year and getting a charge on his residential property i finally got my money back, this is the only thing he understands. You are right he states he trades from curtis road in norwich, and actually trades from his home address Windfalls, Milestone Lane, Wicklewood. i wish now i had called cowboy builders. Start legal proceedings, he will try all sorts to get out of it, get a charge on his property.