How to get money back from cancelled apple store order (visa)?
You will need to get in contact with the online store team of the country you purchased from. Here's the ways to contact Apple for order enquiries. If you can't call them, during 'normal business hours' you can chat with them.

Chat
Shopping online and have a quick question?

Our trained Chat specialists may be available to assist you during normal business hours.
Simply click the “Chat” button at the top right of the Apple Online Store page.

Phone
Have questions? Ask an Apple Store specialist:

1-800-MY-APPLE (1-800-692-7753)
Open 24 hours a day, 7 days a week