A somewhat different situation, but my cousin was blacklisted from Nike. I don't remember all the details, but he bought an item and while the payment was processing, he had to switch banks or CCs or something so Nike wasn't able to get the money from him and the item shipped. Since then Nike...
Unless he placed an order for two, I don't think Adidas can take his money just like that. They can ask him to send it back, but he has the choice not to. He'd just be blacklisted from adidas forever.