When you say "One of us have Oneworld Sapphire status", is that person the lead traveller in the booking? They may need to be so to be able to do this online. Multiple FF numbers on bookings can often cause problems too, esp if from multiple airlines.
I would work all of that out, get all your info ready, and give Privilege Club a call in Doha (cheap via skype or similar - number available on your QRPC dashboard). Alternatively you could also try live chat through the website but you might get referred around a bit before reaching someone who can fix it. Phone might be quicker and/or easier in this case though. Likewise if none of you are QRPC members, call Doha CS/Reservations, not your local number. Good luck!