Can't downgrade my account

I’ve been trying to downgrade my account but it keeps telling me “To downgrade you must have fewer than 5 imported unshared lessons”. I can’t seem to find the lessons it’s referring to… I deleted everything, even waited some time to be sure the deletions were synced or whatever, logged out and in again, but it still doesn’t work.

You did canceled it successfully and your account has dropped to the FREE level now.