If something is broken right now, call the service desk at 1 (888) 974-2779. A person answers, takes the details, and either fixes it on the call or tells you who owns it and when you'll hear back.
For anything that can wait an hour, email [email protected] from your work address. The request opens a ticket automatically, and you'll receive the ticket number by reply so nothing disappears into an inbox.
When you get in touch, have three things ready if you can: what you were doing, what happened instead, and whether anyone else is affected. A screenshot beats a description. "It's slow" with a time attached beats both.
Every request gets a ticket, every ticket gets an owner, and you can always ask for the current status by replying to the ticket email, or by calling and quoting the number.