Keep getting Mac App Store Update notifications for an App I had refunded (no longer have)

I bought a paid App via the Mac App Store that didn't function as promised. I contacted Apple and requested a refund, which they granted, and the app is no longer on my MacBook.

Two days ago, the Update logo showed up next to the Mac App Store legend under the Apple logo, which is odd, since I have that set for automatic updates. Sure enough, it was for the App I had refunded & no longer have.

I don't see a way to remove the App via that icon in the Update tab; further, it's not in my list of purchases (because it has been refunded).

Has anyone encountered this before, or can anyone point me to a help article? I've searched but the results have not been relevant.