Better to yell at the automated dude than a real person (like you ever get to talk to one). That is an excellent time to vent if you ask me. I have the same problems with Verizon and their useless automated system. Do those people really think I wouldn't just look at my account online or my phone if I want to know how many minutes I've used, if my payment posted, yada, yada. Nothing makes me angrier, and I'm usually pretty restrained. When I call that number, it is with an issue that needs resolution, not for general information. I think they know that, and make me jump through all those hoops hoping I will give up.
I guess I'm just trying to say... I feel your pain!