After contacting them last night about this issue, this is the email i received this morning.

"Thank you for contacting the Square Enix Online Store Support.

We apologize for this inconvenience. We are experiencing a delay with the second codes of early access for PS3 and PS4 users. Within the following days, we should resolve the problem and you will be able to enjoy the early access to the new expansion!

Best regards,
Linda,

The Square Enix Online Store Team"

Not sure if this is good or bad news.