For every skill claimed, you should have at least two accomplishments on how that skill was used and was of value to the company. In each call, you have to be respectful, not let your irritation show, and be purposeful. But in the 1990s, customer s won't take it anymore. They're more demanding, more confrontational, they know how to price-shop, and they have no brand loyalty. The hierarchical organization of the Industrial Age is disappearing.
Organizations are flatter now, and everybody has to assume more responsibility and accountability.
Your ego will take a battering, but don't take it personally.