Change the network and have a try again.
Please try Google Chrome, Safari or other different browser, or you can clear browsing data and try again.
Try other payment methods. If you want to use other payment methods, please contact us directly.
If you don't have PayPal account, you may get it from Apple Mac App Store with your Apple ID.
If you still have purchase problems, you can send your error message or screenshots to us via [email protected]