Terrible service

On the 30 June 2020 I purchased a Builders brand geyser element from the Centurion branch. It worked perfectly for two months. On 9 Sep it just stopped working. I took it out of geyser and returned to the store, after speaking to management. When at the store, Johan the store manager said that I have to contact Heat tech direct. He said he tried to contact them, but could not get through. I then bought a new thermostat, hoping that is the problem. But still does not work. I called heat tech this morning, I immediately was assisted, so I do not believe that someone could not get through. only to hear that builders must exchange, as they only work with geysers under warrantee. So it is another 150 liters of water wasted to drain the geyser. As well as a weekend without any hot water. And another call out for the plumber. Who is going to carry my extra cost, seeing as all this could have been avoided?