I was hired by a guy I called my friend. He was hired by a disaster restoration company. He wouldnt tell me what company, or which insurance company. I performed services and provided materials for plumbing repairs. When I gave him the invoice he began to question everything on it. He also became verbally abusive. He told me he required all of my receipts for materials. I do have mark up on my parts. I also added profit and overhead to the bill. I can’t seem to get him to call me back. I performed this work on time and materials. No upfront contract. I also have been made aware that the house has asbestos in the mud of the walls and I did cut holes which has exposed me. What can I do to get paid?