Coba Landscaping & Construction

this company designed and built a new walkway and paved patio in my home. After a couple of weeks moss and humidity started appearing in some areas, When I called the manager to request he visited the place and indicate how he would remedy the situation, he started making all kind of excuses (that is a too shady area or the plant bed is too high) all factors that should have been considered in the designing of the project. Not only has Mr. Coba not responded to my last message but he also seems unwilling to accept any responsibility.for the situation.