Samsung bottom of the range doesn't work

I bought a new Samsung 9kg top loader washing machine in May 2014. From the start it left a residue on all the clothes after the wash.I only use a liquid washing detergent and no softener. I logged an internet complaint on the Samsung website and they said I must clean the drum with vinegar, washing liquid and boiling water - imagine a new machine that needs cleaning!. I then called Samsung customer service to tell them this didn't work. After a few calls they sent a technician from Polokwane to look at the machine.The technician said the problem was that the outer drum was plastic and I had bought the bottom of the range. He had no solution to fix the problem. I continued to complain to Samsung and they only told me to clean the drum. I have reference numbers, dates and names. The fact is that the machine leaves a residue on the clothes that is so bad that I have to rinse all washing by hand when it comes out of the machine. I have back problems and am a pensioner and can't do this anymore. Customer Service put me through to a supervisor who appeared less than interested. Promises to revert don't materialise. A nightmare year . What a terrible brand. Never again Samsung!!