Change in dates : ZA***2 Fly Blue Crane

I'm trying to change the dates of my fly tickets. I've given the booking department the dates, however they say that I have to change the dates with Fly Blue crane for the outgoing flight myself!! <br> When I do contact Fly Blue Crane , they say they haven't received the dates for the flights I want to change to .<br> Now my question is, I need to change the dates before the end of January or forfeit my ticket . The inbound flight I've received a quote which has time restraints. <br> But if Fly Blue Crane hasn't received their schedule, then how can I book??? This is beyond ridiculous...and I'm still being charged a fee per person for all this