Q: How can I verify In-App purchases?

I have three games on my iPad that require in-app purchases of coins to keep playing.  Yes, I am hooked

I receive a receipt through the app store but not always in a timely manner.  They sometimes show up days after I've made the purchase.  I have tried to verify all my purchases several times by clicking on the Purchase History link in the email that goes to phobos.apple.com, which I assume is a finance company that processes these payments.

I consistently get an error message "Safari Can't Open the Page".  Can anybody guide me to the proper place to verify my purchases and ensure I am not being double billed?

As always, thanks for the help!

Angie