Maintenance for the week of April 6:
• [COMPLETE] ESO Store and Account System for maintenance – April 8, 9:00AM EDT (13:00 UTC) - 6:00PM EDT (22:00 UTC)
If you bought the correct version, you should have received a mail with an attachment the same way you got the monkey. I got all those mails/attachments at once on Sunday when I logged in for the first time and created my character. If you were supposed to get all of them and did not, I'd submit a help ticket for it.
That item (and anything else from the "Explorer's Pack" bonus) isn't available until you enter your official full game key on launch day (4/4/14).
Apparently there was some issue that gave out these items to some people early. ZOS has a topic stating this in the Official News & Discussions section.