As I understand it, only mods have the ability to update submission titles. You can email them using the Contact link in the footer.
The guidelines include guidelines around submission titles. I don't know the title you submitted, but in my experience, mods edit titles to make them more in keeping with the guidelines. Often (but not always) they include a comment that they did edit it. But, if you've got a question about it, you can ask by email. They don't always see comments.