A call about a grant.

I was told I qualified for a $7500 grant.  I'd applied recently for several, as I'm going back to school after an illness, and I stupidly thought it was regarding one of those.  The scammers are getting smarter.  Makes me afraid to know what information has leaked from WHERE.  They got angry when I told them I'd not but a green dot card for $300.00 to "ensure there were no clerical errors".  I told the woman that I'm living on a friends couch following an illness, and I don't HAVE $300.00, which is why the $7500 would be SO NICE.  She told me it was my problem and hung up on me.  

DO NOT GIVE THEM ANY INFORMATION!  Thankfully, my credit is crap, and I only have about $5.00 to my name.  But they're getting smarter.  Be VERY careful.