It's gotten harder to find reliable information about customer service, because search engines like Google have become more complex, and frustrating. Here's a tip.
The Customer Service Search Engine
You might try The Customer Service Search Engine, which was created specifically for people who want a faster, more efficient way to search on related topics. It screens out the junk sites, places that have no information except for pitches and that try to sell you something.
Unfortunately, the engine doesn't work if I try to paste it into this page, so the link to the custom designed search engine for all customer service related topics is here.