Customers demand an unholy amount of attention, clearly under the impression that they are the center of the universe and their every need must be doted on. Unfortunately for these Karens, they aren't the boss of everyone else. This Karen customer sent a feisty email to OP, who was the manager of an employee who made a simple mistake in delivering the wrong internet item to said Karen. OP offered his apologies and told the customer he would return the item at the company's expense, plus ship th…