Envious Lawns

I agreed to an artificial turf lawn replacement for $8000 in September 2019. According to Mike of Envious Lawns, (who also does business under Mikeandsons Services of Tampa Bay, LLC) a roll of turf arrived at my house damaged. The guys "Frankenpatched" my front lawn to solve the problem that day and Mike agreed in writing to order more turf and come back and replace the substandard area within 30 days. Weeks went by and when I questioned him about returning, he asked if he could wait until he ordered more turf for another client and then use the extra to fix my yard, to which I agreed. More weeks went by and I contacted Mike again and he finally set a date to come back, but he failed to show up or even contact me to tell me he was not coming. Now Mike has disappeared and will not even answer my messages or speak to me. Last week, 2 months after my last contact with them, the new manager of Envious Lawns left me a message (which I still have) asking me to contact her about my complaint and when I did, they pretended that they did not know me. All I want is for Mike to replace the badly patched section so it matches the other section of the lawn. In addition, grass from under the artificial turf is growing up through the artificial turf and I have to constantly pick it out. I do not believe they put any weed killer on my lawn for which I paid, but how do I prove that? I contacted them repeatedly in the fall of 2019 and again yesterday and after months of being ignored, I am tired of waiting for them to honor their written agreement and have filed a complaint with the BBB. I have everything documented and in writing.