Is there really no way to turn off iCloud notifs from emailing you?

I don't want to use the iCloud storage but it did end up somehow uploading an amount of my photos, not completely using up the free storage but almost. And it is emailing me pretty much every single day to upgrade. I don't want to. I can't find anything that tells me how to get it to stop email harassing me. Is there no way to make it shut up?