Sold Faulty goods, lasted only a few months, then Xenon told us it was our problem

Myself and a few other clients had bought batteries, within a few months all the clients' batteries had failed. There was nowhere to visit or contact someone on the site, at a store, through a mail or phone. When we finally got to a mail that worked, Xenononline eventually admitted that they had faulty batteries that they sold us, but there is nothing we can do about it as they don't respond on mail to any requests for a refund or anything. We are stuck and had to rebuy from another supplier. XenonOnline cheated us out of around R30,000 and refuse to take any responsibility for faulty goods sold. Please beware as I believe they are not honest and if anything goes wrong with your product you will never see the money again...