There is no better service out here that you cant do for your self. Customer Service isn't rocket science and when based on treat others as you would want to be treated and the rest is easy. Personally, I would say it would be a waste of money to outsource this service when all of us can provide it
That depends what "customer service" you are interested in.
Once you know that, you can do a web search to find firms ... And request customer feedback.