When attempting to renew my subscription through Mog Station, it allows me to put in my payment information, then asks me to confirm the payment, and then says "An error has occurred. Please confirm the status of any relevant options and then try again. For details, please contact the Square Enix Support Center. (Error code: 406)".
I contacted support about this issue. They claimed that this was a card declined error, but I had just gotten off the phone with my bank to confirm that they were not declining any charges and that there were sufficient funds available.
I decided to wait one week, and then try again, with the same result. The only solution offered was to purchase game time cards, or crysta, to pay for subscription indirectly.
Unfortunately, I do not feel that that is an acceptable solution, and I will not be renewing my subscription unless SE addresses the issues with their payment system so that I can pay for my subscription for this game directly.
After researching this problem, I have come to the conclusion that it is fairly common, and that there are many who are willing to buy crysta, but also many who cannot, or like me, will not.
So far, I have not seen any acknowledgement from Square Enix, or Square Enix support representatives that there is an issue here that needs to be addressed with their payment processing system. This contributes to my decision not to renew service at this time.
If SE has a customer retention department for FFXIV:ARR, I want them to be aware of this, but I am not sure how to make sure that happens.
If an SE representative reads this post, I would appreciate an official public response regarding this issue so that I know it is being heard. I know there are many frustrated fans in the same situation. I have read the sticky on error 401 and 601, and do not feel that that addresses this issue as I have taken all of the steps suggested there, and this is technically for a different error number anyway.