Unhappy customer

My geyser burst in Sept 2024, and the insurer appointed Heat Tech to install a new geyser. 5 months later, the geyser is overheating and leaking. I then switched it off. The plumber (Oxyros) appointed by Heat Tech comes around, they switch on the geyser and see a spark and then leave. They then write a report that the issue with the geyser is caused by an electrical fault, which is not true. I called an electyrician to check the fault, and they noted that the spark caused by a fault on the solar related part of the geyser. I called both service providers to inform them of this, and they are taking me from pillar to post. Please stay away from both of these service providers.