Not satisfied with product

I went to buy makeup at the Fochini in Cresta. The sales assistant whom I found there asked to assist me choose a foundation that was suitable for my face. I spent R505 on that product cause she had said it's the suitable range for my skin type. I'm now stuck with make up that is making my skin breakout and does not control my oily skin as she had promised. I'm very disappointed that my money just went down the drain for nothing.