Sorry to hear of your difficult situation. The NPPR is like any other debt, such as ESB or your apartment management fee etc. They will go through the process of chasing you through the Courts for the money. I'm sure that you really don't want a system whereby anybody can get 'leeway' if they phone up with a good story?
If you are losing 800pm, it really doesn't sound like this can continue. You should probably have a good think about your overall financial situation and consider your options. You could post details of your financial situation in the Money Makeovers forum and get a few other opinions if you like.