急：意铁网上购票未收到邮件怎么办？

今天在意铁网上购mini票，最后付款后也显示付款成功“You have successfully completed your purchase.” ，可是在左上角有个提示“Error code : Due to some reason the mail was not been sent. ”，邮箱里也确实没有收到，怎么办？？网页上就有一个 Retrieval code，怎么办啊？？？