Question

NJ : I engaged a painting professional to paint my bathroom in a decorative stenciled plaster. They provided me written contract which was not signed by either party. They provided 2 color samples yellow and green and I agreed to green. I gave a 50% deposit. Midway during the job I noted that the color looked yellow and not green. I saw the yellow bucket of plaster in the bath They told me it was the the correct color, they were only using the bucket for " mixing" The next day, a Saturday and a holiday, they returned unexpectely and spent all day working on the room. Since then the color is not like the sample, nor is the application like the sample. It is splotchy and patchy. I brought this to their attention suggesting they stop to evaluate, they became very angry and stated that they were not finished, that it was spotchy and I had to wait until they finished to evaluate. They said they don't get paid until they finish. It is now done :it is still not correct. Do I have recourse