Ring a few times on the half hour or the hour.
Ring early in the day but not overly early in the morning, say 11 or 12 (unless on profile say work earlier...could try an exploratory call a bit earlier.
After a few calls with no response..leave it to a later day.
Even though many do not like texts, could venture a text(especially if texts are not discouraged on the profile)....I am so and so with a few reviews (most should have access to the " forum" if they want).
If no response on a couple of tours, I would suggest not to be overly bothered (perhaps may not like your number for some reason. )
I have had a similar response today, could have PM'd a couple of days ago but was in 2 minds and only rang in late afternoon.
Escorts will probably be busy with a couple/few regulars today (1st day in town of 2).
Onwards and upwards to somewhere else.