Atlas 20 lt Gas geyser constantly breaking

A Brand new Atlas 20lt Gas geyser has been installed during June 2022 at my house (617, 22nd Avenue Rietfontein, Pretoria) Since then it has malfunctioned constantly. Why must we fix a brand new geyser. It broke down again on Friday 23 September 2022. I am fed up with Atlas who don't want to replace it. It's been working for about 4 weeks in total since installation was done. Please help. It was an insurance claim via Standard Bank insurance