Jiji either allows sellers delete bad reviews and scammers alert, or Jiji deletes them themselves.
I bought a parrot from King Oche on Jiji and the parrot was sick, I did not notice because it was sold in a box. The parrot died after 4 days. I had a parrot before this and kept both of the apart so my original parrot is still alive. When I left a review, mind you, I did not curse in the review. My reviews and comments was deleted. After checking online, I found I was not alone. If you've ever left a bad review about a seller on Jiji.ng go back and check. It has been deleted.