Definitely contact centrelink - I find ringing is quicker than messing around with the website - you might be surprised at what you're entitled to, as some of the benefits hinge on what the lowest income earner is getting rather than the total amount. You can even give them different scenarios, eg, what do we qualify for this year (based on what you have already earned) vs next financial year (when you might have earned nothing at all) because again that might make a difference too.

Have you investigated the option of cutting to only one day or even one and a half days? Are there any other community based child care centres or kindies that might offer a similar program for a different price?