The stalker story seems unlikely. Why did she take the booking and then suddenly decide that he was outside her apartment? Because she spotted him, or because he contacted her? Either way, why didn't she immediately contact the police and have him arrested? Even if he ran off, at least he'd be gone.
Yes, problems can arise. But when this keeps happening, and is accompanied by a reluctance to apologise, make amends, or try to make other arrangements... ? And when the escort also has a reputation for often not giving ANY response to multiple messages... ??
It's poor customer service, a lack of consideration for those who pay her bills.