how could she?

how could she?I am so mad!  Sorry I need to vent, a lady from another site offered some gift cards to help raise money for my son.  Well she didn't sent the cards and offered them at a cheaper rate.  That is just so wrong on so many levels.  I don't understand why she would do that knowing she wasn't able or wouldn't follow through on it.  Well I sent one back the amount of the gift card since that is what she paid for and I have to mail the other lady back hers since she mailed it too me.  I am so mad, really if you can't do it why offer?  People should really think before they do things do they not think it will hurt others.  Now I am out more money than I got because the right thing to do is refund the amout they expected to received on the gift cards.  uuuurrrrrggggghhhhhh!!!!  Not made at the ladies just made at the lady who offered to do this.  I don't understand how she could do this. 
Thanks for letting me vent.  This is all I need so close to the time the money is due and I don't have it.  baaaaaaaaaaaaahhhhhhhhhhhhhhhh