I am so mad

I sold my breast pump on ebay and the lady that bought gave me bad feedback. She said is was DIRTY (I washed and sterilized it) and that parts were missing (which I don’t see how, because I double checked EVERYTHING) and she complained because it took so long to get there and said she couldn’t get in contact with me. I wrote her BEFORE she left this and explained to her what had happened. There was a freaking ICE STORM. I am not about to put my baby in a car and drive on ice when I have no idea what I am doing. What a bitch. She should be happy. She just bought a $300 pump that had been used once (but is some how dirty, what a crock) for $75. I am so mad. I am not selling on ebay ever again.