Best Custom Tile Work in Phoenix AZ

After installation they did not tell me how to fertilize or atleast to use the fertilizer. My grass started to look pale and after then they told to use the fertilizer. Now I see a lot of weeds growing in the grass after few months. I will look for a better landscape next time.
I lost the contact number of the person named Derrek who installed our backyard. I called their office to ask his number. But they would not give me his number. A change in behavior before and after the job is complete.