Not able to buy pro license

Third day I am trying to buy Unity Pro License, however, I am still not successful. My problem is in 4 step called Payment. I suppose I should be able to enter my payment method but I get just animated circle with "Please wait while we process your payment.".

I am trying to buy Pro, iOS and Android subscription. I am using Mac OS X 10.9.4. I tried Safari and Firefox. I also contacted support but they did't answer. What else can I do?