I fell for the exact same trick, I am not ashamed to say a few blue moons ago in the US, while on a business trip. I got a few adds off the net somewhere and called up. It was my first ever time trying to punt in the states.The minute I started asking questions about the services, I was accused of being law enforcement and everyone hang up on me. So I found another one and called without asking for anything! I said I just want a girl, they asked me what type I prefer and 30 minutes later a good looking blonde was knocking on my door.
I gave her the $200 as stated on the add and proceeded to get undressed. So what would you like she asks while sitting there looking at me... I said what you mean? Well BJ is $150, sex is $300 and so on. When I told her I had misunderstood how things work here in the US of A and asked for my money back, she started getting loud, saying she will call her driver up and so on.
As this was a business trip, a fancy hotel and didn't want to kick up any fuss of course, I ended up having a covered BJ for $350 dollars in total! It still angers me to this day, but you live and learn I suppose!