Damage to my roof and leaks all over

My roof has been damaged due to multiple guys standing on there whilst fixing gutter work I ordered, now have leaking into my house. Various points of the gutters also leaking, and not even 2 weeks old. Owner won't take our calls. Damage getting worse and worse. Guys work very untidy and leave huge nails laying all over place, don't clean up after themselves. I told the owner they are very untidy. They splash mud all over walls, had to ask them to clean up, he reckons, the rain will do it. I laughed and said, no you will do it now before you leave. He begrudgingly removed the mud with a broom. Removed bird boards at top point of roof and didn't put back, now I have birds in the roof too. Nightmare continues, after I just wanted to do my gutters, that's all.