ReviewOpedia review: My review was deleted!

Horrible website, I would not recommend ReviewOpedia to anyone! I left a negative review there and it was deleted. I made another one and the same thing happened. Their customer service said that my reviews did not meet their standards and that's the reason why they deleted them.
I asked them to explain what their standards were but they said that they don't have time for that and said that I can find all the necessary information on their site. I tried to find some information but found nothing. Still have no idea what the problem was .