iCloud payment

It all sounds like baloney to me. Here's an article that provide info on Phishing emails, and reporting them: Identify and report phishing communications - Apple Support

I don't know what you are referring to about "downgrading your update to remove the storage plan option", but I can tell yo that there is nothing that is going to "remove your storage plan option" (whatever that means), and you cannot ever downgrade an Apple update without jailbreaking your device (which you do NOT want to do).

So, I'd report it....

Cheers, 🙂

GB

Scam. Although some of the wording of a "regular" confirmation email from Apple has been lifted, most of it is malarkey. This is what my email from Apple regarding my iCloud Storage payment agreement looks like:

You can also check to make sure that you do not see an actual charge that corresponds to that email, you can to iTunes on a computer, sign in with your Apple ID, click on Account>View Account, and under Purchase History, click on View All, and check the date that the email states you were billed. If you don't see anything there, then that confirms that it is total spam.

Cheers,

GB

If necessary, contact iTunes Support. Scroll to the bottom of the page in the 2nd link.

iTunes Support

iTunes Support – world wide