How can I get my $500 that was redimed?

if it was me then I would read If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support

and if there was still questions then I would reach out to apples support

 Get Support (apple.com)

And or

 Contact - Official Apple

Support

And or

Contact - How to Contact Us - Apple

Or

Genius Bar Reservation and Apple

Support Options - Apple

How can I get my $500 that was redimed?

What can I do to get back my$500 for my gift ca

gift card redimed

See -> Check your Apple Account balance -> Check your Apple Account balance – Apple Support (UK)

Spend any balance remaining on your Apple Account balance.

scroll to ⤵️

If you have an Apple Account balance that you can’t use

You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows the refund of redeemed gift balances, you can contact Apple Support to request a refund. 

When you contact Apple, include the following information:

•               Your Apple ID.

•               The refund amount.

•               Your current delivery address.