FABO Court
Well before passing judgement on either side, let's see evidence.
A: post the PMs.
B: post pics of the item(s)
C: post pics of the label showing shipping cost.
And then maybe we third party folks can get an idea of what actually took place. As a trained investigator, there's usually at least 3 sides to every story.
Person As side, person B's side and somewhere in the middle is usually the truth/actually what happened.