Poor workmanship in Lehae face brick houses

We bought a house in Lehae phase 4 and we were told that we have only 3months to report any faults about the house. Things looked good from the outside disaster came when it rained. Rain comes through the door and underneath. Window seals are falling off. Plumbing is a mess. All in all cheap material was used to build these HOUSES. We ment with Barry the main boss of the company and he promised to fix all our problems and gave us his word that he will do a 100% job. He even said there's a budget for maintenance. My house is a joke cant even bring my parents to come see my house Right now i dont have a bath am using a dish to bath myself.