When your team care about the company they work and feel good coming to work they will automatically look after the customer.
How do we get them to care?
What is it that inspires you to do your best work? Have you considered what things might be fueling the work of your employees/coworkers? Although unique to each worker, professional drive has a basic core to which everyone can relate. Discover your essential similarities, and use this knowledge to inspire others to cooperate, instead of mandating that they do so.
Don't dictate -- inspire
Don't direct -- win people to your way of thinking
Begin with praise and honest appreciation
Build morale and earn loyalty
Ask questions instead of giving direct orders
Give the other person a fine reputation to live up to