Basically we bought a vacuum from a seller. He claimed it was used but has normal wear-and-tear and does not have any other issues. He gave us a $25 discount from the listing price as well.
We paid him $100, and got it home. Turns out it was busted and won't stay on. The guy is ignoring us and ended up marking it as sold to someone else so we couldn't leave a bad review. He has a 5 star rating with 20 reviews.
How do we go about being able to leave a negative review?