Hi Refund888,
Welcome to the Apple community where some of us do our best to help each other.
In the transaction details, you have a CaseID
and it seems to say "Need Seller Response"
It seems to say "pre-approved payment is cancelled" ok.
There is a link there to "view case details" ... I wonder if you have viewed those details ?
OR
If you used Apple ID when you cancelled:
You might want to sign in to My Support with the same Apple ID that you used to start your case,
then look under the Recent Activity section.
You may see some progress, or find out if a refund is being issued ?
How long refunds from the App Store or other Apple services take:
https://support.apple.com/en-au/HT210904
Apple support has other articles online that may be of help or interest to you:
Get help with content you've purchased through Apple.
https://reportaproblem.apple.com/?s=6
OR: If you are certain there is not already a refund request waiting to be filled, as there seems to be:
(or not listed as a refund on your next payment method statement)
Request a refund for apps or content that you bought from Apple
https://support.apple.com/en-au/HT204084
Hope there is something here to help you progress your case, if that is not already under way.