Voltsustain "self-sustainable generator" is false advertising and not true

Bought a " self-sustainable generator" from Voltsustain based in Witbank that took 6 months to be build. Excuses over the 6 months for taking so long were that they experience difficulty importing the parts. Took delivery and the generator last exactly 6 hours maximum until it stopped and the batteries empty. They admit that they knew it will happen, but it was too late and therefore sold me the unit. Promises of installing an upgraded charger is continuously the response, but they do not come up with it. Please do not waste your money on this false advertising of them, and end up what seems to be nothing other than a inverter system that only works until the batteries run empty.