3.5 Ariston

Can Heat tech Geysers contact me on *** because Aubrey from Heat Tech do the disappearing trick while you communicate to him on the phone. My problem is with the 3.5kW Ariston slimline instantaneous electric water heater. They sell these geysers and the do not work. I am a Qualified Instrumentation Technician. Their number is *** their e-mail address is not working.