Maintenance for the week of March 16:
• PC/Mac: No maintenance – March 16
• ESO Store and Account System for maintenance – March 18, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
If you purchased the game from a retailer, you should receive two codes (not counting the early access one), one of them with the explorer's pack. I did not received the second code either, so I suppose that's the reason we cannot get those items