betogb:For the last 3 months, I haven't been able to buy credits. I always get the same error message even when introducing card info every time or even trying to use a different card.
I'm no expert at this - but what type of card do you mean? By that I mean is it a credit card, a debit card, a gift card, or else? I believe there have been changes to what types of cards are accepted now.
Best way to be sure is to contact Customer Support - I am sure they want your money!!
GL.