Paint

I went to Game Store Chris Hani Vosloorus looking for a PVR (Pure) paint, and I wasn't sure about the ones I saw at the store and decided to ask someone who works there to show me exactly what I want and I was specific that we want a PURE paint and not a 'Water Paint' and the guy showed us the one he says its a pure paint, so today I started painting the house and unfortunately when I was done I didnt like the results of the paint as it faded on the wall then I double checked the little that was left of it and mixed it with water only to find out the guy gave us a "Water Paint" which I was specific that I dont want it.. Very disappointed.