Stone Guys Masonry

Originally it was wonderful and would have received A across the board but weeks after the job was done (and paid for) they came back and poured a slap of ugly uneven concrete 6+ feet long on one end for *no reason*. (they had said they were just going to add loam around the single loose stone on the edge that I had mentioned should be secured prior to winter icing). They immediately promised to return and remove the concrete strip, acknowledging that it was definitely a mistake and an eyesore but cancelled or didn't show every time they scheduled. I have been attempting to contact them for over a month now via phone and text but they are not responding.