啊。。。改期出现问题。。。。求救。。。。。。 在biling address那不知道怎么填,然后填了好多次,都是credit card number无效,不对,最后给我了这个。。。 You have entered invalid payment information too many times. For security reasons, we will now sign you out and prevent you from signing in again using this account. Please contact a Pearson VUE agent for assistance.