From an SE email:

This is a notice to all customers who use PlaySpan as a method of payment to purchase Crysta.

As you already may be aware, PlaySpan retired the Ultimate Game Card and UltimatePoints at the end of September 2014. This means it is no longer possible to purchase Crysta using these 2 options.

The last day to redeem retail Ultimate Game Card codes was September 29, 2014 but UltimatePoints can be redeemed up until October 31, 2014. For additional information regarding the retirement of these options and using your remaining UltimatePoints, please visit the appropriate link below.

Ultimate Game Card: http://www.ultimategamecard.com/
UltimatePoints: http://www.ultimatepay.com/

In light of this news, we have also decided to remove all PlaySpan payment options from the Mog Station and Square Enix Account Management System with immediate effect. We'd like to apologise for the sudden removal of these features but would like to reassure all customers that we still offer a varied range of payment options for the purchase of Crysta or subscription payments.

We continue to work with payment providers to increase the number of payment solutions we can offer you. Please keep checking announcements for the latest updates.
Thus, if you were using PayPal because your card would return an error, you currently cannot renew your account to keep playing. This appears to be affecting linkshells of several of my friends.