Bad service

On Tuesday I bought a make up foundation from Clicks with an assistant of their make up artist, when I get home I realised that Revlon has changed their product, the colour that I've been using since 2006 has suddenly become lighter and not what I would use. I returned the foundation to clicks, only to be told that I can't return it. So, basicallly I spent R325 on something that I will never use. I went to Clicks (Sancardia) to return the product, I was told I can't return it. I checked the terms and conditions at the back of the till slip and it States that if you are unhappy with a product you can return it. I have the following questions to Clicks and Revlon: A person on the make up isle must know the products and be able to advice. I told her that I used to colors since 2006 toast and toffee in my understanding she was supposed to know that Revlon changed their shades and advises clients to also change. Why are there no testers in your store? What I got was a total rip-off, R325 for something that will go to the dustbin.