Sorry to hear about your experience. I've dealt with Slickboys in the past with no issue. However, I would feel the same as you if I was asked to pay to return an item that shouldnt have been sent out, especially at full price. I like my labels and tubs look good too. When I'm paying for anything, its the whole product and package I'm paying for and all of it should be right.
Maybe you should contact the soap maker direct and explain the situation to them. Most of them are usually quite good and understanding when it comes to customer service.