FNB Insurace - unable to resolve issue and fix leaking geyser for months

FNB short term insurance is still trying to fix an issue of my leaking geyser for the past few months after a new geyser was replaced. Numerous plumbers were sent out, each time a different issue ( new pcv valves that was replaced 3 or 4 times, different diagnoses), on two occasions the ceiling water damaged and recent water damage this week. The geyser is still leaking and the issue is still not resolved. A new geyser that was fitted should not be leaking. A new diagnoses was communicated to me earlier and I was told that the water pressure is incorrect on the entire property and I would have to get new fittings from the main supply of water. Not one was there ever mentioned of a water pressure issue, then it was the piping could be blocked. I have never ever had an issue with water pressure problem on my property and the water pressure is fine.The reason for the leaking geyser keeps on changing and I was told I would have to ensure it is fixed. I requested a full report and what needs to fixed and will take matters further. All correspondence since the geyser started leaking was sent to the FNB insurance department. Why am I paying for insurance if a matter like this can't be resolved?