Mangosteens are being difficult

We had predicted that the mangosteen harvest would commence in earnest around mid Feb. It is now the third week of Feb and there is only a small dribble trickling out. Most are still green.We are all ready to go - and we wait and we wait. Last week we sent 6 trays to Sydney -  less than 20 kg. It looks like it will be around the same this week. We want the deluge!!! And we want it now!! If it delays much longer we will be on the plane to Los Angeles, with the crop still on the trees. So we are desperate to get the crop in before the end of March.