Sorry. I meant to include a "vanity" notation somewhere, but it's been awhile since I posted something, and I got caught up in the moment.
That said, if they promised to send you one, it is unacceptable that they would just say that to get you off the phone, and they deserve every ounce of contempt I am sure you have for them.
Maybe you should consider yourself lucky that you got a power cord.
1.) Install power cord (purchased separately)....
My HP psc 2110 did come with a usb cable, but maybe they figure that usb cables are so ubiquitous that most folks have a couple spares.