If you’re looking for the quickest way to contact a large company, check out GetHuman at https://gethuman.com/ .
You do NOT want to Google for a support number, unless you really know what you’re doing. That’s how a lot of people find and call fake companies and scammers. But GetHuman is trustworthy, and will only show legitimate contact numbers.
This website directory goes further, though — it will tell you what numbers to mash on your phone, to quickly navigate/bypass the robot menus and speak to a living being at that particular business. If a company has a callback feature, it may also reveal a button to quickly use that!
And if the company you’re trying to reach has no support number? GetHuman will tell you and advise on the next best way to get a hold of them.
Update: ContactHelp is a similar site, offering hard-to-find contact phone numbers.