"Pending" booking question

I hope this is the right section to post in! We're going to Beijing soon and are flying to Shanghai with VS and then looking at getting short connecting flights with China Eastern (MU). I called yesterday to book the flights and although VS have a codeshare agreement with MU, they have to wait for flight requests to be verified. The flights have now been pending for over 24 hours with no change, so we can't book. I have spoken to three different FC AU helpline members and all have told me slightly different things. One said that if pending for more than 24 hours it means an airline will definitely not confirm and that it's worth trying different times on the connecting flights, one had no idea and the other said it could still be confirmed if I wait another 24 hours. Does anyone here have any experience with this? Thank you 
