Hello Egwest3,
Thanks for asking the Apple Support Communities for help with a pending charge on your account. I'd recommend reviewing the information below regarding pending purchases and refund requests from Request a refund for an App Store or iTunes Store purchase:
"If a charge for an item is pending, you haven’t yet been charged and can’t request a refund. After the charge goes through, try to request a refund again.
If you have an unpaid order, you must pay for the order before requesting a refund. Learn how to pay an unpaid balance in the App Store or iTunes Store. You must have a valid payment method on file to make purchases in the App Store or iTunes Store."
After the pending charge has been paid, you can use the steps in the resource linked above to request a refund. If you run into any trouble, reach out to Apple for further assistance with your account: Contact - Official Apple Support
Thanks and have a wonderful day.