We’ve all been there. Something goes wrong, so you call customer service. What answers is a bizarre, arcane mess of an answering machine where you have to puzzle out exactly how company x categorizes customer issues when all you want is to talk to a human being. Saying “Complaint” cuts through all of that, but you might need to wait on hold for a bit. Just make sure you’re nice to the person on the other end.
This is entirely dependent on the phone system and this will not work a lot of the time.
Phone systems I have managed or installed will never work with this.