Help

[xmaddude]

i'm trying to use a pr- paid credit card i bought at Walmart today to renew my subscription but every time i enter the info i keep getting this error..... An error has occurred..
Please confirm the status of any relevant options and then try again.
As repeated registration failure can lead to restrictions being placed on your account, we strongly recommend that you contact the Square Enix Support Center for guidance before attempting to register a Credit/Debit card again.

A bunch of people i know that play this game tell me i can use one but it wont work for me what am i doing wrong?