Distinctive Interlocking

Asked this company to repair concrete stairs and put a retaining wall. Some stairs became loose within a week. Called Ryan, their main guy, he said he would come back and fix. He never showed up. After many attempts over more than a year, even during off season to give him a chance to fix it, he still promises to show up on a specific date and doesn't. We have children and elderly parents and loose steps are unsafe. These guys are keen on getting paid immediately but they will never stand by their work once paid.