Aztec Masonry and Concrete

The concrete work Aztec did at our home has been assessed by concrete professionals as inferior and sub standard. The chucks of concrete are falling off the sides , concrete is chipping and crumbling in the jagged saw cuts and along the sides. They were very unprofessional and unreliable. They actually admitted they didn't see in the email we sent and contracted with them to perform that we wanted rounded sides. They offered a redo but since they had performed so poorly (even on a second partial attempt where they outlined with darker concrete) and they couldn't send us to a property where they had done similar work we failed to believe given a 3rd chance they would do a better job. They left concrete rock debris all over our property, cable lines exposed ( they actually cut a cable line which had to be repaired) and failed replace dirt/ grass. We had to hire someone else to clean up. We've sent registered letters and pictures of their inferior work, they do not respond to us and have not yet refunded our money. We will have to have the work redone by a competent company.