I'm in the same pain. I can't pay. I tried having my mother make the payment for me from my home country. But it was rejected.
Now that I read this I'm assuming that's because of the 30 days lock...

I also had trouble with paypal through ultimate pay.
I contacted them and they said their lock is 48 full hours long.
I'll try again tomorrow, having someone make the transaction from my home country.

In case it doesn't work, how do I know how long my SE account is locked? I'm assuming with all the tries I made that i'm lock for 30 days if not 30 years >.>!!
Thank you square enix!

Where is that "shut up and take my money" gif?