When I go out to my user page, I don't see anything
indicating that someone has replied to me. I've had some
difficulty communicating with someone about an audition. Where
can I find help?
If you contacted someone via their Contact link, you should receive any replies via email, since that's how Contact messages are actually sent. We don't save contact messages.
In a case like this I'd advise you to contact them again and send them your email address or phone number so they can contact you directly.