While I'm not saying it couldn't happen, I trust the Apple Store when it comes to shopping. I'm guessing that the Apple Store is the only location where you used your credit card. Since you don't live in the US, I'm guessing you were on vacation. Generally, these types of things happen in places like restaurants, where you hand someone your credit card and it is out of your sight for an extended period. Any purchase I've made at the Apple Stores I've visited, the credit card is swiped right in front of you and handed right back to you.
Try contacting the police where you live and see if they will work with the police where the Apple Store was located if it can be proven it happened there.
Also, there is no email address for the store, but here is the address and phone number so you can call them. Address:19501 Biscayne Boulevard Aventura, FL 33180 (305) 914-9826