Two guys walked out from neighbor yard with big shovel carried on their back and they walked to their black truck. They ignored me after I identified I am the owner, and "You are in my yard". They drove away but they drove back and they blocked the driveway to look at our house, then they drove away. Did research of the company because there was no name, what they do if they are contractors for the neighbor. Asked neighbor to confirm and she said yes, they are the contractors who works for XYZ company. Called the firm people, someone stated he own and manage the firm. Let him know the above but he stated he does not know anyone who own the black pick up truck or two tall guys with shovels. He made it sound like I was making story up and he would not apologize.I received the voice mail from the person who stated he owns the company, but it was not clear of what he said. I called him, and he stated one of the guy is a contractor, and the other guy works for him. They admitted that they walked in the yard. He stated it should not happen after the homeowner identified this is their property but it happened. He did not offer any remedy.