Part of the job is being available, you might days with nothing going on and suddenly the phone rings and is your choice to leave errands, hookups, etc. for later and take the call or not.
At least in this century escorts have a cellphone and they're not stuck at home waiting for their landline to rin like it was in the early 90's.
the guy who contacted you at 7:30 should have been more flexible, maybe his expectations about you being available right away were too hopeful but most escorts usually can go meet someone at a hotel within an hour of less as long as they're free.
Massages are too much work and half the pay or even less. Make up your mind about it.