Bad after sales support

Me and my partner bought a show house in Leopard Rest not knowing the were hidden faults with the house reported the faults to Matthys whose the after sales support Manager got told that the house is over a year old and there aren't any warranties for the house, Window sills have water marks,tap kitchen mixer is leaking plus damaging the sink cupboards also the wall outside is showing water mark which we believe the pipes inside the wall are leaking. we've logged a call with Matthys for over 4 weeks now the guys only came to fix the water marks but they painted with the wrong colour and didnt do a proper job as the water marks are showing again!!!!