Appalling quality and service from Samsung - I'm still waiting

My Samsung 13kg toploader is 1 year old now. 3 months ago it broke down and had to be repaired, a month after that it broke down again, 9 days ago it broke down for the third time. Samsung has consistently refused my request for a new machine, ordering new parts each time I call them out. One "new" part only lasted two weeks. I can only get through to them via a call centre and deal with a different person each time. During the course of last week I was told twice that, at my request, my booking had been cancelled. A technician came out for the second time today, only to tell me he needed to order another part, which will take another eight days. The company has consistently ignored my request for a new machine on the grounds that this machine had needed repairs 3 times with its first year and is obviously extremely faulty. They claim they only replace machines after 6 months.