You have a profile on TER (https://www.theeroticreview.com/reviews/sexy-sadie-6124440878-330865). It was created when the first review for you was published, in August. There's two reviews now.
The TER member who submitted that first review filled out a form to create your profile. He included your P411 ID and your phone number. So that's how *anyone* who goes to the TER site can see that info, and more. They don't need to be a TER member--it's public info.
You need to be a TER member to do things like post messages and submit reviews, and VIP membership is required to see everything in a provider's profile and in her reviews, although providers who "claim" their profiles can see their entire profile and everything in their reviews (and get PM privileges). That's called "limited VIP". If you want to do that and don't know how, see the page linked below.
About the guy who contacted you not having a TER membership... he may have one and would rather you don't check his posts and/or reviews.

Another benefit of limited VIP is that you can search by email ID--assuming the email ID he used to contact you is the same as in his TER member profile.
If you don't want your profile in TER, you can use the Contact Us link (bottom of the page) to request to be delisted--but you'll need to claim your profile first.
Hope that helps.
-- Modified on 10/6/2017 8:29:26 PM