I´m getting the same problem here, however, I only can buy 400Ms points. I tried to buy 4000Ms and I couldn´t, after I tried 400Ms and it workerd, then I tried 1600Ms and didn´t work and finally I tried to buy 400Ms again and worked again, I imagine it isn´t related to my paypal account or credcard. I use paypal and I´m really upset with this. Does anyone found a solution??