High level of incompetence

From being happy with the technician's work to unhappy with after support. My insurance lodged a geyser replacement with PJ Pro services (PTA) on the 30th of September 2025. The day after the geyser installation, I then started experiencing problems and reported to them. The technician who came to assess informed me that the Pressure valve is the actual cause. Since the geyser is ****pa, as per best practice it is recommended that the pressure valve should also be changed to the same size as the geyser. And that has never been done. I do understand that pressure valve is not covered under them. However, I requested a written report from PJ Pro services (PTA) on what their technician recommended which he also mentioned them so that I can submit it to the insurance and body corporate. After going back and forth, I have been sent a one-line report about something which is totally irrelevant to the issue. To me, this yields a high level of incompetence.