Worst service ever

Absolutely terrible customer experience from Samsung. I've been trying to get my washing machine repaired for nearly 6 weeks now, but every step of the way Samsung promised something which was not delivered on. Eventually after such a long wait a technician came out and said two major parts were broken and needed to be replaced. I also had an independent technician to take a look and he said there's nothing wrong with the parts, it's an electronic fault which only Samsung can reset with their software. Eventually I had no choice but to pay for the parts that were apparently broken. When another technician came to then install these parts I told him to keep my original parts as I will have them inspected. After mulling about for a while he said, 'oh well it seems there's nothing wrong with the parts, it seems to be an electronic issue'. Promised me someone will call me back the next day, still no phonecall a week later. It seems they tried to sell me parts that were not even needed. I'm paying a premium for the Samsung team to fix this washing machine, I've never had such delays and slow service plus they tried to sell me these parts which are not needed. I'm still waiting for them to finally fix the machine. In the meantime I've written a long complaint letter to Samsung to explain my situation. I received a short email back saying 'someone will be in touch when the parts have arrived...' meaning the person did not even bother to read my complaint - parts already arrived and they weren't needed! I am now investigating how to report Samsung for this. I've paid nearly halfway towards a brand new machine and have gotten nowhere in 6 weeks.