To answer your question Andy about "what you should do to protect yourself and your friends" you should contact the police and report him.
Posting his number here will not protect you ............ in fact if he finds out you posted it then he will be extremely angry and may return for revenge. In the words of Doom, don't be "stupid"!!
Paws
Send me a private message telling me what your name etc was when you advertised here. So long as I can verify you were are recent advertiser I'll give you access. It is not a case that you need to pay anything for access, just that I need to check you are a real escort.