If you had a definite booking then post a review on the London Reviews board, please. This site operates best on valuable intel re: a WG's service.
Or, to put it another way.... if you had read a review on this WG, alerting UKP that she is a No Show, would you have gone ahead and booked her?
Possibly not. Hence the importance of flagging up bad service.
More here: https://www.puntingwiki.com/wiki/Guide_to_UKP_review_writing
One thing..... she charges £110/hr for covered oral. Is that what you were happy to pay?