Plumb Ambulance damages to property after repairing a pipe

Plumb ambulance were supposed to repair a leaking pipe in a bathroom at ILLALA PALMS 43. They chopped the area in the wall open to repair the pipe but it is still leaking. They did not close the area and left the tiles and walls damaged. They were paid for repairs but they refuse to fix the damage. I have photos of the damage. Where can I attach them. They are from the north of Pretoria.