Hello, This is the Gravity Co., Ltd. Ragnarok Online: Zero operations team.
We have confirmed an issue where 
Premium Black Tickets are not being delivered via RODEX,
and this has been forwarded to the responsible department for review.
We will work to resolve this issue as quickly as possible, and we sincerely apologize for the inconvenience caused to your gameplay.
For customers who have not received their Premium Black Ticket,
the item will be distributed sequentially after data verification.
Any further updates regarding this matter, including normalization progress, will be provided through updates to this notice.
Once again, we apologize for the inconvenience.