I've had this happen a few times. Most often it's the
Disney Store. They once sent me a Tinkerbell beach towel. Another time I ordered one of their personalized fleece blankets. They sent me the wrong princess.
The one that was the biggest pain was an order I made from American Girl. In 2012 they were getting ready to release a new historical doll. They offered a preorder for her collection. I ordered one thing, her big item that had a $300 price tag. They shipped me one and I had it in hand before the official release. When the collection was released they sent me a second one! I didn't have the need or space for two. Like many other stores, American Girl's normal policy is to tell the customer to donate it. This one they wanted back. Between waiting for the return label and getting FedEx to pick it up, it took a week to get the giant box out of my house.