Feel more than welcome to check out ourBuyers FAQspage which details the next steps to take depending on the status of your order. I would also suggest that you speak to your bank and let them know of your situation. They will have processes aimed to retrieve your funds for the online transaction you have made.
Let me know if you have any questions.
Ollie | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog