It's a collection company that uses unlawful methods to collect.  They threaten people with fraud, and jail time etc. That's illegal since debt is a civil case, so I would ignore them completely if they use that tatic.. Ask them to validate the debt.. if they can't or wont.. then hang up.. they're scammers..

got a call at work from a 8779316270. dont kno who it is. they never state their name. they give some case number that i have no idea wut its for. it needs to stop because if they keep calling my work i may get fired and my personal life is none of my workplaces' business.