You probably went to mogstation to input your code? Im not sure when to use the mogstation site, but if you got it from an online retailer you likely need to use :

https://preorder.eu.finalfantasyxiv.com/en

(its the site I used)

If you have na you can change the ''eu'' to ''na'' altho I think it should automatically take you to the right site.


Not entirely sure why they use multiple sites tho, shrug.



PS: already at my post limit for today, hence the thread instead of a response to your thread ;p