The first thing you do is call the police. Tell them that someone is tearing up your property and that you are fearful of violence.
Meet the police and explain that you have not given anyone permission to be on your property let alone to tear your property up.
Insist on filing charges of trespassing and vandalism.
Let the police take it from there.
If that goes nowhere then fill a civil suit against the contractor and the general contractor.
Do not play nice with them.
Tell the cops you heard shots.
“”If that goes nowhere then fill a civil suit against the contractor and the general contractor.””
That would no doubt be a meaningless gesture...
I would have shot at them