Poor Customer Service(Technician)

I purchased an LG 14 place truesteam dishwasher for R17k last year in May, 2 weeks ago I was woken up by the sound of gashing water from the wall mount angle valve where the dishwasher's inlet hose connects to, upon shutting down the water supply to the house I discovered that the metal connector on the inlet hose that connects to the angle valve disintegrated into two pieces that led to the water gushing out from wall mount angle valve. My wife contacted LG's customer services and logged a call *** and this was assigned to a technician (Charles) which was supposed to come inspect the damages. Charles asked for the pictures of the damaged hose then later sent a quote for repairs worth R1590. I called Charles to find out why are they quoting for these damages and he bluntly told me that the warranty doesn't cover the hose, I then told him it doesn't make sense that a metal connector on the hose just broke off, he then said it is because of the water pressure, as showing my frustrations towards this ordeal I asked him where do I complain? he then rudely reply that I should take the dishwasher where I bought it. My frustration is that he claims that the water pressure from the wall mount angle valve is the cause for the metal connector on the hose to disintegrate but he didn't even show up to inspect the water pressure, what add's fuel into the frustration is that on the same wall mount angle valve I have had my SAMSUNG washing machine on the very same spot and same water pressure since 2016 which uses a plastic hose connector but never it disintegrated. I can only conclude that LG manufactures inadequate quality products and this is according to Charles. If LG is not prepared to replace this hose at no cost to me, please get your dishwasher and give me a full refund so I can go buy a SAMSUNG dishwasher. I was in a process of buying a 900L InstaView Door in Door French Door Fridge with UVnano replacing my current SAMSUNG fridge, but this has left bitter taste in my mouth.