Our film was reviewed and voted on before the film came out

I noticed that the date on IMDB four release was before it actually came out, and in that time people had written horrible reviews and voted it with 1 star without ever seeing it. I knew we were being targeted by racists as one of our leads is black, and had seen on other sites that they were planning on 'down-voting' it, and they managed to do it before the film even came out, and now IMDB won't do anything about it. They said 'everyone is allowed to have an opinion'.... It can have a huge impact to indie filmmakers, but they just don't seem to care anymore.