I am always leary of the bodyrub/massage sites as there seems to be so much YMMV, upsell, bait and switch but I also know of some legit options and women with reviews here that only list on Rubrankings so I wanted to share a recent bait and switch if it helps anyone.
I had answered the ad for "Alex" that I had been hawking for a while. Had all the markings of a too good to be true scenario but communication seemed to be efficient and complete so I wanted to check it out. Confirmed an appointment with Alex at appointed time, texted within 30 min of appointment time to double check and was reassured she was gonna be there. I arrived and walked in and it was completely different girl who barely spoke English. She said Alex was with a customer but I could go back with this one instead and I said no. I mentioned I had just confirmed with Alex and she said sorry and maybe 20 minutes but I doubt Alex was ever going to be the one I would have seen. Didn't cost me anything except wasted trip back and forth but this one is definite bait and switch
https://www.rubrankings.com/united-states/district-of-columbia/washington/bodyrubs/body-rubs/fit-young-and-petite-massage-therapist-49457.html
Sorry to hear about your experience, but alas, something anyone who has visited a massage parlor has experienced. I'm certainly not making excuses, but I have found unless you are a known returning client of a specific lady you scheduled with, she more than likely will accept the first client that walks in the door. Too many times, clients will no show even after making an appointment and following up like you did. They don't want to miss out on a sure client. Think "A bird in the hand..." Or like you said, maybe Alex doesn't work there. I guess we will never know unless Alex ever gets a review.