Have you tried using Ultimate game card?

http://ultimategamecard.playspan.com/?_kk=ultimate%20game%20card&_kt=17744efb-4e80-43d3-82fd-8fafd1707805&gclid=CO7o5vS5_rkCFWJp7AodGW4Ang

After you purchase choose to add crysta in your square enix account and select Ultimate Pay > 4 more choices > Ultimate Game Card > Enter Pin