WP Civil Contractors: Poor Tar surfacing & Tree Felling Job

WP Civil Contractors did Tar Surfacing and tree felling at my business. The job started out fine but I was eventually asked twice for additional money to remove trees. The owner (Washington) of WP Civil contractors says that he actually doesn't do tree felling but yet he quoted me for it. The owner of WP Civil Contractors was rarely on site to supervise his workers. On the second day of work they were 2 and a half hours late in which the owner said that he was fetching a machine. A machine was not seen on the second day. Eventually when Tarring began, they proceeded by leaving out the G5 gravel that I was quoted for but stated that they substituted this with thicker tar. I was not informed about this change. On assessing the tar surfacing, there was organic material (roots) that was actually sticking through the tar in numerous areas. They stated that they had put chemicals on them to kill them even though this did nothing to fix the holes now in the tar surface. In 2 large areas soil could still be seen and not even 10 mm of tar was covering these areas. I was quoted for 30 mm of tar and apparently got thicker tar. I have contacted the owner to fix the poor job and he continues to say he will come through but then cancels with excuses. So much for a 6 year Guarantee. I would not recommend this company if this is the work that can be expected.