I'm trying to purchase both DLCs available, but when I try to get it ingame, they say that I don't have credic cards on my account and put me on https://secure.gamesas.com/addcard

No problem, but when I sign in go to the page, only haves the "Error Could not find your credit cards" (obviusly) warning and the home button, without any option to include a card o.o

What's happening?

Don't bother, nobody is playing it anyway. TRUST ME, save your $$$!