Honouring of Geyser

Outsurance Replaced my Geyser in 2023. 2 Years Later Brown Sluggish water Comes out of my Geyser. The Warranty of Geyser is 5 Years. Outsurance want me to do a 2nd Claim for same Fault which is their Fault and not mine. The Team Leader tells me Warranty only if it Burst the Manufacturer only have 6 Months warranty on Brown Sluggish Water. Brown water means the Geyser is on its way out. They Replaced my Geyser with a Cheap Product which doesnt last and is huge Safety Risk for my Family. I have 2 small kids this serious safety Issue. I have lost complete Trust in Outsurance and in process to Cancel House and both Cars with them.