Bitch: "Maybe it won't end. Later. "
You: "Can I call you back in an hour?"
Bitch: "Well, I'll call you back after the meeting." Don't be silly, he will definitely forget.
You: "I'm sorry, it's a deal ~ I'll call you later."
To sum up, calling many times is short-lived, as long as the other party doesn't turn off the phone! The boss will report your phone bill ~ you will get a bonus if you get the customer! ) thick-skinned, cautious. Don't let go of any loopholes in the other party's speech. Seize the opportunity and slap him in the face. If he feels ashamed, he will show you his cards.