求教vueling订票后怎么再加行李？

我订了2张罗马飞巴塞罗那的票，订票时看说明可以后加行李，当时还没算好要带几个箱子就先选的不带箱子。前几天准备得差不多了，想要托运一个箱子，可是找不到怎么添加。邮件里有个Remember,第7项写了“Remember that all your suitcases must be included in the Booking and must travel in the aircraft hold. You can only take your hand luggage onboard (maximum weight, 10 kg and maximum dimensions, 55x40x20 cm). If you have any additional suitcase to add, click here. Adding a suitcase at the airport costs more than including it online.”

但没有链接链着那个“click here” ，到他网站上的“Change and itinerary”，也没找到改行李相关的内容。


有没有高人知道怎么在订票后加行李的啊，请指教指教，先谢了！