
Let's be honest: Cold Calling is hard. When making 100+ calls a day, it is easy to become discouraged and burnt out, especially when some jerk takes his frustration out on you. It is especially fun when this jerk decides he is going to, "Teach you a lesson" to never call him again. When this happens, I encourage you to be as professional as possible and quickly get off the phone. This call is going nowhere. For the short term, be sure to not call him within the next 3 months. After that, he probably will have forgotten his rant ever took place.
What this jerk doesn't understand is that you are a professional. Your dedication and service is needed. You create opportunities and open doors that were otherwise closed. You represent progression. Your product/service serves a niche in the marketplace. What you are selling might not be a perfect fit for him but it will be an extremely useful tool for other teams and help them gain an advantage over their competition. Keep this in mind.