When I raised the matter with paypal they would not look into the case as it was showing as money sent to "family and friends" and was not a case of goods not sent or being damaged or not as described, and when I flagged things up with adultwork they said they did not get involved with cases of deposits for escort bookings.
Paypal is technically correct. However it is now a criminal offence within the UK for an escort to request a deposit for "sexual" services. It is perfectly legal for a masseuse to request a deposit if no sexual services are provided. You did well to bring this to members attention and if you wish the police will lay charges but likely an English court well away from home and you will be called as a witness, your choice. All to often we hide problems believing them to be our failings when they are only a roll of the dice. Many years ago I was cajoled into a flat only to be threatened by a boyfriend with a knife. Not pleasant especially for him.
Well done for coming forward you have me thinking about a new post