Simple. Don't write it!

If she doesn't have an ad, or website, you can't write the review. Simple.  There is nothing to link to and TER requires an "internet presense" to link to. There is a possibility she has ads elsewhere and you can search the internet and try to find another ad (however it can't be on a TER competing site).  

It sounds to me like she is UTR, since you said she is from an agency but not listed on the agency site. Now if she is UTSr there is a reason. Why do you want to write the review so badly anyway? I say let it go

If they refuse, then obviously they or she wants to remain UTR, though I've never heard of UTR gals working through an agency.

Most agencies need and want all the publicity they can get.

Maybe she is new and they just haven't gotten around to updating their site yet.

Ok thanks guys... I learned a new term today "UTR".. And yes she is UTR, the escort service texted me pics of different girls they had available that weren't listed on the site. But she is definitely from the escort service. I've tried searching her name on BP many times, but no results. Also I know for a fact she's changed her name... So I guess I can't do the review on her... It's unfortunate because it's a REALLY good review though. And I really want to warn people not to waste their money on this particular girl.... OH well.   Thanks again guys.