Join the real world. They are moody because customers treat them like imbeciles, they're paid minimum wage, can't move for hours on end, can't go to the loo or have a break and are doing that kind of work because they have no choice. I have 2 GNVQs, a City & Guilds certificate, 2 A Levels and a Degree and I work in customer service. Do you think I want to be there? Do you think I enjoy it? I do it as I have no choice but I am nonetheless friendly and polite. People who have never had to do that kind of crap job are too quick to criticise.