My email is me.com but I also get email for someone with the account @icloud.co

If the part before the @me and @icloud are the same they are one in the same and interchangeable. "If you created an iCloud account before September 19, 2012, or moved to iCloud with an active MobileMe account before August 1, 2012, you have both @me.com and @icloud.com email addresses."

iCloud: About your @icloud.com, @me.com, and @mac.com email addresses - Apple Support

Both are iCloud email addresses. Since they are coming to your email box, is that the iCloud email address associated with your account?

Link to contact Apple Support in the article.

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