it took them a while to get me my stuff too. i also had a monday interview, and i waited until the thursday before to start squawking. turns out they did forget to send my stuff. they had to saturday deliver my standby ticket, and i got the email on thursday. there's a bunch of more forms attached to the email (in addition to the app) you'll have to fill out, including PRIA requests for your former employers.
those poor guys seem really busy right now (the phone calls i have received from them have always been after 6pm), so it's quite possible that you slipped through the cracks. i'd start asking questions by wed if you still haven't got anything.
when they realized they hadn't sent my stuff, they were very cool about it and said not to worry if it didn't arrive in time; they'd just reschedule since it was their bad.
hope your stuff shows up this week, and good luck at the interview!