Best Gravity System in Phoenix AZ

We had to have roots cut out of our septic of a home we are selling. They left the roots in the yard, didn't clean anything up, drove over our driveway and big rocks and tore it up, broke our irrigation and left it to run through the neighborhood and left our trees and shrubs with no water. They knew we were trying to sell it, and were so careless. Thier price was way too high as well.