Apple wallet & cash

See if this helps:

Set up Apple Cash - Apple Support

Pay particular attention to “What you need.”

That appears to be your AppleID “account” balance.

NOT Apple Pay. (Apple’s similar-sounding names CAN be confounding)

Unfortunately an AppleID account balance can’t be transferred to Apple Cash.

“Apple Pay” doesn’t have a balance.

Cards linked to Apple Pay - including AppleCash - do.

AppleCash can only be “filled” with a participating Debit card, or by a transfer from another AppleCash user.

Unfortunately that’s a bit harder.

Obviously you could spend it … but that’s a pretty significant balance to spend.

Don’t know if you’re eligible for a refund, but this article seems to be the reference document.

Check your Apple Account balance - Apple Support

As I inferred, that balance in your screenshot isn’t chump change.

I did confirm - at least on the US’ Apple Store site - that you CAN purchase new devices using your AppleID balance.