That's weird. Please click on the option 'unsubscribe here' from the email you've received. Also, try these steps: YouTube app > tap the menu button > Settings > Notifications and uncheck 'Recommended videos'. Let us know if this helps.
@TeamYouTube @YTCreators
Why I’m I receiving these guys notifications if I don’t subscribe or know them?pic.twitter.com/udSV4y5o9d
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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