Firstly, you need to ask your customer for some picture as a proof, which include: picture of the wrong design item, and picture of shipping label.
Then, we will check your proof, if it’s wrong design from what you ordered, we will resend or refund depend on your requirement.
Note: with shoe wrong design problems, we can only accept to process a replacement or refund, if you lodge a complaint in 1 month after your customer receive package.