No service delivery

As a first time buyer of a new home my experience was very unpleasant. Due to expectations not being met and lack of communication. When ever I follow-up on progress I dont receive prompt response i have to keep sending emails begging them to attend to my email. When I went for inspection of the house, things that we agreed they will attend to, I am not getting feedback. But I get emails after emails to sign completion letter without them having to honor their promises. I am really frustrated with Calgro M3 development.