wrong standard colour

Hi. I bought Randcon paint through December 2014 to paint my new house. One colour was velvet brown and the other a cacabanna. Both believed to be standard paint mix. My contractors ran out of both these colours and I bought 2L of each colour to finish the job. Unknown to me that all the colours where different and that my lounge and hall way was now 3 different types of colours. I am very unhappy with the results of your paint. Now only the colours but the paint is now starting to chip off my walls if you move over the paint.