Make sure that when you want to add an item to your cart, you have used the selectors below the add to cart button to choose the colour, size or quantity that you want. Then click add to cart to get that item in your cart.
When you want to get rid of the wrong item in your cart, click the cart button in the top right of the page. All the items in your cart will show there. You can then click the "remove" button next to the product you do not want.
