If CodeBox shows up in your purchases go to the App Store Featured page and click on the Account Link under Quick Links on the right. Change your password and security question by clicking on the Edit button for your Apple ID. That will take you to the My Apple ID web page where you can make the necessary changes.
Search your computer for "CodeBox" and then search for the developer's name, "shpakovski" to make sure you didn't purchase it and forgot about it. Even if you trashed the app there are usually remnants left behind unless you purposely cleaned everything out. Check with family members to make sure they didn't use your account to purchase the app.
If you are absolutely positive that you did not purchase CodeBox and it shows up in your purchases list delete all the information in your account such as contact info and credit card or PayPal info. Check with your credit card company or PayPal to see if you were charged for the CodeBox app or anything else that you did not purchase.
Click on the Support link below the Account link on the App Store's Featured page and notify the App Store (iTunes) that you did not purchase the CodeBox and want an explanation for why there is a fraudulent charge on your account.