Geyser replacement

My geyser burst and I experienced great service from Auto & General in getting a plumber appointed and the geyser replaced. However the subsequent service has been absolutely abysmal. Two months later and many phone calls to the call center and the insurers later, we still have an installation that has been condemned by the insurer's appointed inspectors. We have had many promises, including from the service manager, that they would look into the problem and revert to us within a stipulated time and we are yet to receive a single response. We have received only hollow promises and lies.