There are also
/feedback
/bug
First is for general game comments about something, you like it or don't like it or think it should be changed/enhanced whatever.
The second is for when the game seems broke in some way, like a quest does not update or you can't interact with something you need to interact with or a missing texture or any other game issues like this. These will not give you a ticket that will be responded to, but does give information back to the Devs and QA folks.
In your situation with Crowns not being there, /help is the best one to go with.