With most voice-recognition systems if you blow a couple raspberries down the receiver (or rub your finger on the mic or otherwise generate some noise) they'll give up after a couple of tries and take you to a human.
Some just hang up on you when they give up. Quite awful
I usually just tell them "sales" (because sales treats callers the best of all the departments, as they usually want your money) and then wait for the actual person to transfer me to the appropriate department.
...and then wait for the actual person to transfer me to the appropriate department's automated voice system.