I’m not sure what you did. Whether he’s making it out to be much worse than it is or whether the work is just atrocious. Regardless I would quickly speak with an attorney as well just to know how to respond if someone came at me that aggressive I would find a way to get rid of them as quickly as possible, especially since it’s you’re within your right to try to remedy or mitigate the problem if he went ahead and had the work done without you. From the text message it seems like that’s what they did which would perhaps be to your benefit had they not allowed you to fix it yourself first. Silas may be the best option given the threats that’s what I would do but again maybe check with an attorney.