<p>Sarah Kalliney doesn't have time to do her laundry, visit her parents or change the cat's litter box. She eats out six nights a week, uses a personal shopper and gets her groceries delivered to her doorstep.</p>
<p>But the time-starved Manhattan executive, who bills at roughly $200 an hour, recently spent nearly 10 hours battling her cellphone company, Sprint PCS, over $9 in late fees.</p>