Faulty lock, Shocking service and False advertising

End May/early June I had an Xpanda security gate installed. The lock is faulty. After much frustration and several come-backs the repair-person confirmed the lock was faulty and proceeded to file away the groove on the wall frame that one of the latches is supposed to lock into! So now in addition to the main lock being faulty, the double-lock does not lock into place and the higher spec security gate that I paid extra for is in fact not that at all. I left several messages for the sales rep Vincent and a person named Risha asking for the gate to be uninstalled and for a refund because I have not got what was promised and what I paid for. Vincent insisted on coming to verify the issue and while in my home proceeded to insult me with the comparison that a car dealer will not replace a car that's faulty, but repair it instead and therefore I could not expect Xpanda to uninstall the door and refund my money. He was rude and categorically refused to consider my request. He stated a new lock would be sent and the wall frame would be replaced. That was in August and I am still waiting for any communication. In the meantime I heard their advert on 702 - also on Xpanda's website - of a money-back guarantee so I e-mailed Vincent and the e-mail on their website. I have had no response from either. My security gate is faulty, I am at risk in my home because of it and Xpanda refuses to engage. This is false advertising and shocking service !!