if you know a provider has fake reviews on ter and has a pimp that attempted to rob you. how do you get those reviews removed?

It’s pretty difficult to get reviews taken down, but you can always post a ripoff alert to warn off other mongers.

That sounds like a terrible experience. You could contact ter I am not sure if they will remove the reviews. You can try.

Not sure what almost being robbed by a pimp has to do with fake reviews,  but unless you have hard evidence, let it go.  

to challenge their own fake reviews, but it doesn't extend to us customers.   It sounds like in your example, the provider was colluding in the creation of the fake reviews.  No way to fix that as far as I know.  

All reviews on TER are fake - just to varying degrees.  The business model of giving someone 15 days of VIP status encourages fake reviews; they know that and don’t care.  Pimps faking reviews?  Why would  TER care? - it generates revenue for them.  
The only reasonable assurance Is to look for ladies with a lot of reviews.   Read them and look for common threads / frequent comments, and  you can probably believe those.    Anything else is fantasy BS

I once saw a local provider, during our session I had a wonderful time with her, she was kind, sensual, provided a very upgraded menu of things I like and we even shared some pillow talk in between rounds.  Fast forward to some months later and I read that she had did a complete 180 degree turn from when I saw her and was suspected of setting guys up, doing cash and dashes, etc.  So maybe the service just varied drastically.  Sometimes these women fall on hard times and lose their motivation to provide solid service.