I thought I was calling the correct phone number to update name change (marriage) on an upcoming United Flight. I had just quickly googled number and it wasn't actually United Airlines. It was FlightHub. And when I asked him several times, he acted like he was part of United. FlightHub tried to charge me over $232 for what should have been free. Luckily my credit card company caught it. Cancelled card and getting a new one.
Made sure to be calling United directly and was able to change name for no charge.