Geyser burst

I registered a claim Monday morning at 8AM to replace the geyser. After numerous follow up calls, the plumber finally arrived just after 4pm to inform me that the geyser is still under warranty and he's not allowed to replace it. I phoned them again Tuesday morning, the was only answered after 18 minutes. The manufacturer arrived without the replacement geyser to inform me that they don't have the replacement geyser. I followed up again, waited 15 minutes before someone answered and was told that they will send some today still. I followed up again after 3pm and was informed that they are unable to replace the geyser today. I'm busy looking for a new insurer.