Bad service from Universal Paints Woodmead

I received a bad service from Universal Paints Woodmead. The paint I requested and what was shown as sample was not what was sold which I saw when painting. Shop refused to take responsibility. They just said the matt sheen would be better on water based enamel. I asked that the guys come to premises less than 5kms away to see that the sample and paint sold are different and they refused.