From a business perspective, no offense, but those aren't the customers Sprint (or any other business) is worried about losing.
It's unfortunate if you've fallen on hard times and I'm sorry you're having to deal with that. However, people also need to realize a cell phone is a luxury, not a need. You can have unlimited house phone calling plans (local) for under $25 in most places still. If that's not an option for you, depending on the phone you have and the plan you're on, maybe selling your smartphone and downgrading to a standard phone with a minimal plan might make things more affordable until you get back on your feet again.
The bottom line is that Sprint isn't a credit card. You either pay in full monthly or you lose the privilege.