Drowning in Debt, what do we do????

My Husband and I have about $28,000 worth of debt, about $17,000 of that is his tax bill with another one coming at the end of this financial year. We can't keep atop, are struggling to feed our kids and ourselves (we ALWAYS make sure the kids are fed even if we have to starve). We have worked out we could afford $200-$300 a week repayments on a consolidation loan, but unfortunately our credit history looks that bad no one will touch us. It's just that we had a bad patch and fell way behind and nevre picked up. Pease help, what can we do? If it helps I am in Australia.