Problems with donations

Hello, I have an issue while try to buy coins
When I get authentication code from my bank i get message "Page not found 404" and can't buy coins... I donated several times without problems and now I really don't know ehat is problem. If somebidy got that kind of problem please tell me. :)

I can agree with it, i got the same problem 1 hour ago, and my visa said, sucessful paid.

I contacted PaymentWall and still not fixed... I don't know maybe it is Warmanes problem...