Did you forgot to add other legs to your booking? You can do that over the phone, although finding a support agent who is competent enough to do that may be a challenge.
AFF Supporters can remove this and all advertisements
It was more asking for a friend, who has accidentally booked SYD-LHR but not the other CPH-HEL-HND and HND-SYD legs. I'm trying to avoid them having to contact Qantas as getting a competent support agent for OW classic award stuff is a bit painful.