If you have not received a purchase order, you can always look for it through your purchase history in iTunes.
On a computer with iTunes installed, click [purchase history] to have iTunes open and display your purchase history.
You will be asked to key in your Apple ID and password. You can also see a list of content you've purchased from the iTunes Store by following these steps.
1) Open iTunes
Click on iTunes Store on the left side of the iTunes window. If you're not signed in to the store, click Sign In and enter your Apple ID and password.
2) View account
When the iTunes Store opens, click the button with your account name on it, enter your password, and then click [View Account].
3) Show all purchases
In the Account Information window, under Purchase History, click See All.
Tip: The purchase history shows purchases made using this Apple ID. Your most recent purchases are listed first.
To view details of previous purchases, click the arrow to the left of the order date. The Order Number appears in the purchase history under the date of the transaction, as shown below.
After checking the purchase history, if you still can't find your purchase order, you can contact the Apple Support Team to find out the reason.
If you want to ask more question, please reach us by finding our in-game customer service and click on "I NEED MORE HELP".