Legacy Masonry and Hardscaping

The largest section cracked in half within 4 months or less. Chunks of the concrete has fallen out. Lines are uneven and multiple rough spots that were not brushed out. Concrete and equipment were dumped and washed out at the edge of my property. I didn't know this happened until my neighbor showed me the piles of concrete in the bushes next to my property line. I contacted the owner as soon as I saw the crack (it was installed the second week of September and I saw the crack the first week of January). He came out in April and said that he would replace the section in late May to early June. He agreed that it should not have cracked and that he would need to put more stone below the concrete. I did not ask him to repair any of the other eye sores - I didn't even mention them. I just wanted the large cracked piece replaced. I reached out to him on 4 occasions and he will not respond. In the meantime my concrete looks awful and the crack has continued onto the next large section. This cost me just under $7,000! I am not happy.