Duratherm....on hot water

It's been 2 days now since the new geyser has been installed..the service provider or plumber has since been called out with the same stupid answer that the supplier needs to rectify or the warranty will fall away...if you go on the internet to seek any sort of guidance you are being directed to different pages which has nothing to do with this stupid geyser in question..now the quickest way is to sweep this under the carpet they are responding on this platform by saying Sorry was your problem fixed since...I'm sitting without hot water now for week and i have a baby in the house..i need this to be resolved by close of business on the 2nd Sept 2020 or i will go the all news and radio channel and expose Durathem for a absolute **** product and service. Lastly how in this world could this product been approved and manufactured and installed in homes when you get reviews like this...shame on you for using peoples monies like this.