Using Inexperienced and Dishonest Plumbers

I called in to log a claim about 4 weeks back now that my geyser was no longer working, Standard Bank appoints a plumber who comes to my house and installs a new geyser, that night the geyser becomes low in temperature and I call in again to explain that situation, they now blame the manufacturer who then sends his plumbers to check in only to find out that the temperature was set below 30 degrees Celsius and they set it correctly. Now it's time for them to give me a report; apparently the geyser was not well installed; basically it's not compliant and it's high risk because there are no pipes that leads outside should the geyser malfunction, most pipes are shorter than they should be, the geyser is sitting right on top of the pipes and it has bent them. The call center Agents are protective very emotional towards this bad service which is really annoying. The plumber rated himself 10/10 pretending to me, I am always calling the plumber and on Friday he told me he won't be coming anytime soon because he does not have a car.