Here's what I do.. change your attitude. Every time they call, get out a stop watch. Start it the moment someone starts talking. See how long your can keep them on the phone before they hang up. Keep track. Learn delay strategies. Your credit card is in the other room. Hold on, you need to look up how much you owe. Finally, tell them you need to sign for a package. Mute the phone, put it down, get on with your day.
Or, if you're feeling irritable, string them along for a while and then tell them this is what you do - every day. "Talk to you tomorrow!"
Oh, and fuck you FCC for being so damned useless.