Medal paint

I zwakele on the 22th of December I bought a paint from build it bolani road zola 2 so now the paint is changing colour is white and the original colour on the wall I went to built to lay a complain they told me that there's nothing they can do they will call the supply to find out then I left the shop so the guy xolane send me a voice message on WhatsApp saying that the supply says that there's nothing to do with it is my faults and they that where I'm staying the wall sweating how do they know that if the say im first person to complain about there product and they the person was painting he do not know how to paint. Medal company I'm soo much disappointed on you guys this not how to treat your customer nothing nothing is perfect guys you can also do mistake when you doing your products we all make mistakes why you guys don't want to accept that