Whether QVC billed her is not the point
There's a general principle in law almost everywhere in the civilized world that if you intend to defraud someone/commit a fraud/do something that is onviously against the spirit of the law, then you can be charged and condemned even if the letter of the law is respected.
Seeing a blind person without a cane, and opening a sewer hole in the ground 100 meters before her is nothing illegal per se, you just opened a hole in the ground.
You'll still end up in prison for years, as in practice that's murder, though you didn't touch the person.
"Oh, but I do't see why he went to jail. Did he do anything to the person? Was it his fault that the person went out without a cane?"
That's very general: and that's fortunate cos' otherwise it would soon be chaos, since it's always very easy to do something respecting the letter of the law that is completely and obviously wrong.
And that's also why laws are quite generic and state such things as "Anyone who willingly causes harm to someone is obliged to repair it", or whatever depending on the country.
Did the woman willingly cause harm to QVC? Check.
Then she's guilty, final.
That she did so abusing a ludicrous failure of QVC doesn't change it more than abusing the ludicrous failure of a blind person forgetting to take his/her cane when he/she should never ever forget it.
I also take the occasion to note that it's a typically geek way of seeing the law, those comments on "but she only did legal steps one after the other, so that shouldn't be illegal". Come to the real world guys. I like algorithms more than the next guy, but I can still see that the law is fortunately focused on intent and not only on individual steps to achieve that intent.