We initially had terrible trouble trying to anything online via the website. Until we worked out how to do it. If you are trying to make a seat reservation, or book transit accommodation (if entitled), there is a very specific way you need to enter your details to make this work (the instructions on the website are not clear as to what to do). Basically, when asked to enter your ticket number DO NOT enter any dots, dashes, gaps etc just enter the ticket number altogether. When entering your name, it must be expressed exactly as it appears on your ticket as SURNAMEFIRSTNAME (no spaces). If you have a middle name on your ticket, it must be expressed as SURNAMEFIRSTNAME MIDDLENAME (use a space between your surnamefirstname and middlename). If it asks for your email address, use the address you used for your booking (or the address to which your flight tickets were sent/received). From here you should able to make seat reservations, and pre book transit accommodation (you can prwview the hotels and not simply pick from a list at the transit accommodation counter).