I see two sides of this situation.

While i completely agree they should have been giving you SOMETHING if you were struggling - I understand also their desire to save for the birth of their child. In fact, if you can possibly do so, you might take some comfort from this bad situation in the knowledge that at least they were not blowing it on something frivolous like material things they didnt need, or booze, or other bad things. They definetly would have needed to save money, but i see no reason why they couldnt have offered you SOMETHING to help, especially if they knew you were struggling. Perhaps you could make good of the situation by suggesting they help out a small amount - and commend them on saving for their child? Its a compromise, and i know its not perfect, but at least you would receive SOMETHING.

If he cannot afford child support that is NOT your responsibility. If he doesn't have the income he needs to return to the courts and try to negotiate a lower or suspended payment. You cannot just let them slide by free for his previous child support.. though I also agree fully all fathers should pay it, it should be fair at all times and often courts will negotiate an agreement temporarily for this reason.

I am so sorry you seem to be having trouble. Is there any local organizations which might be able to help? Usually the salvation army, churches, or other charities can help with things like food, or bills. You might see if you have an Angel Food Ministries near you - they sell a 50 dollar bag of food for half that price, and its healthy food too.

I hope that things get better soon!