Just imagine if you will exactly how many "can I see you in 4 days time at 9pm" messages these girls get. They are here for a finite time to make money, and if they get a call like yours OP, and then nothing until you turn up to the address, that will quickly be over ridden by a booking such as I a make "Hi - Are you available in at 9pm" made at 7pm the same day. More chance I will turn up than you bucko.