Really Sorry to hear this, MrBerks, You have my sympathy!
I don't know what you could have done different, the girl has lots of positive feedback on AW, and been on a while.
Unfortunately greed and the chance to make a quick heap of money got the better of her..
If I was in your position, I would get yourself a new 'Fanny Fone' (well number at least), and book her for a long incall. When you get there, get the house number, then you can ask about your refund / freebie.
If you don't get any joy, simply print off her AW profile, and write a nice accompanying letter to 'The occupier' of every house in the street but hers, saying what activities are going on there, "and if you don't believe me give her a ring and ask for an appointment".
You can rest in the knowledge that by being outed she will loose a hell of a lot more money than what she nicked off you!
PS, I hope she reads this, and takes note!