Be sure to go to

support.na.square-enix.com
click on FFxivarr
in the search box enter in the word "registration"
item 6 on the search results should be the one about secon service account
click on that
fill that form out
submit it
you are given a ticket number

THIS IS THE TICKET NUMBER THEY NEED not the one from the other support center website

if you dont have this form filled out they will try to tell you to call back, the agent i talked to said if i could not fill it out within 2 minutes i would have had to call back, luckily i passed typing class in school so i was able to speed through it.

fill out this form first, or you might get sent back into on/hold purgatory