How to dispute an unknown payment sent via Apple Pay?

Here is a better link for you to use - If you see 'apple.com/bill' or an unfamiliar charge on your statement - Apple Support

Here is an article from Apple on what you can do if you see a charge you don't recognize: https://support.apple.com/en-us/HT210618

That link is for Apple Card and not necessarily useful to this user.

Thank you for pointing that out. My apologies for conflating Apple Card with Apple Pay.

I appreciate the follow up!

No worries. I can use the help answering Apple Pay questions. if you have the time find any with no responses and do what you can. Thanks.