Bigest run around ever

I'm insured with Momentum. Had a Geyser claim the appointed plumber didn't install a stopvalve and oneway valve. This caused back pressure on my pipes which caused a water leak. Contact the insurarer they send someone out to assess , then phone them and they send another plumber to assess second one doesn't even look if it is correctly installed instead just says I don't work on a systems with a geyser wize. Another the third plumber just phoned me to say they are on the way to assess. Three callouts and a day of leaking water??? I've given the insurer all the details of my system, so they know what is installed. I've spent more that 90 min on the phone on their phone system today trying to get through to them, when you get through and ask for a manager they put you on hold until you disconnect.