How do I fill a claim against damage during installation?

I scheduled to help with internet installation on the first day we moved into our new house. When the technician came in, he didn't even put on any booties even we had many at the front door. When he tried to locate the internet box, he moved one of the small furniture by dragging it on the floor instead of lifting it which left couple big scratches on the newly installed hardwood floor. I spent 20K on the new floor and got two big scatches(one foot long, one 1/3 foot long), and couple small scratches on my first day moving in. When I used the online chat to file a complaint, all agents just simply transferred me to another agent repeatedly. The last agent apologized and said there was nothing they could do. I am so disappointed and please tell me how to file the claim against this incident.