United Subscription Agency scammed me, ruined trust in other sells people, took advantage when vulnerable. Valencia, California

I had 2 young men come to my door mid morning in february 2010 selling magazine subscriptions.  They were very convincing with their story.  I went ahead and ordered 2 magazines even though I really didn't have the money.
 
They got me when I was vulnerable.  I had just moved in a month before and lost my father a few months before.  They were so nice I even let them in and fed them tamales.  Looking back now I realize that was pretty stupid, but they were nice and i guess I just needed someone nice around me.  I feel like such a fool now.  I don't trust anyone at my door anymore.  I don't even open the security door anymore.