请教national express 买车票的billing address

我在national express 上买火车票，用得是中国信用卡 MASTERCARD， billing address填的是英国地址，可是付不成功，他说Please check your card and billing details correspond with those held by your card issuer, or try an alternative card.


但是很奇怪的是，我前几个礼拜刚用同样的卡同样的地址买成功过，这到底是为什么