Empire Tree Experts

A neighbor owns a home on the next street over and has property that backs up to my backyard, which encompasses a tree-lined creek between the two houses. My property line runs up to half the width of the creek. The neighbor hired Empire Tree Experts to trim some trees this morning. When I heard the commotion of their chainsaw I looked out my window and was stunned to see them working on cutting down a tree on MY property. I ran outside to confront a worker and told him he was on my property, to stop cutting immediately and to climb down off of my tree. He ignored me and when I was more forceful about my demand he gave me the finger. Finally I located the crew supervisor to try and stop the cutting. He did not immediately tell his employee to stop cutting. It wasn't until the neighbor came outside to resolve the matter that I got any satisfaction. Empire Tree Experts are no experts whatsoever. How do you begin cutting down a tree without even verifying whether the tree is on the customer's property or not and then disregard the demand of the impacted neighbor to stop? I would never use Empire Tree Experts as they behaved in a very unprofessional manner and I suggest you do the same.