If you do a quick search on overnights under £200 on aw - you'll find a number of ladies having £150 for overnight. I've e-mailled a few saying is your rates right.
So if they don't correct it - it should be £1500. Should you then make a booking & stick to the fee they have stated seeing they seem unable to go to the profile & add another 0 to the price tab. They can't be the thick because it is the same page where you update your profile details.