Sorry, who do you deal with these days who has a customer service line? The few that do, you have to go through like 3 minutes of robot "press 3 for this department," with the 0 shortcut to talk to somebody leading to an instant hangup ("goodbye") except on menu 27B where it works
I think that every business I deal with has a customer service line or a physical place I can go to and speak to a human. I try my best to avoid businesses that don't.