I bought the game using a credit card and then applied for a recurring sub using my debit card. I registered my debit the very day I started playing and I didn't receive any error message whatsoever so I thought there's nothing to worry about, then I received an automated mail:

so I went to Mog Station as instructed then Square Enix Account Settings>>Account Information>>List Subscriptions
It doesn't list specifically the payment method details whichever I click, unless I choose update I always end up back here:

just to be sure I updated the details again but,

learning about some payment method errors while searching the forums earlier, is there something else I need to check? I seriously hate getting cut off from playing because suddenly the system doesn't accept my card (which happened to me before and I don't want to experience again)