Try talking to customer service, let them know that you made a honest mistake and would like to get the correct ones from them. Maybe they can work with you and waive one of the fees since you still plan on getting the other set from them. Or they can charge you both fees and lose out on the the rest of the money from the purchase if you were to purchase elsewhere. I think they would like to work it in the way that the company gets the most money. It may work