just post what you want to say to the mod with “mods/mod/moderator(/mods only, if you don’t want anybody except the mods to see your post)” b4 it.
e.g. “mods can you make my subtitle <insert desired subtitle here>”
or “mod only: why was my post blocked?” (although they don’t like that particular question).
remember, the mods moderate everything you post, so they will see your request.