Went in to buy a new iPhone 11. Was told that if ...

Went in to buy a new iPhone 11. Was told that if I added a new line, would get a second phone for free. The salesperson said I could drop one of my existing four family lines so that I would not have an unneeded line. I also have a corporate discount with AT& T. When the new bill arrived, it was 70% higher than the old one. The sleazy salesperson never disclosed this would trigger a new plan with new charges. He also never bothered to check that the corporate discount was being applied appropriately. It took me 45 minutes on the phone with an annoying customer service person to bring my bill down back to where I expected it to be. I have been told our firm now has a corporate discount with Verizon. Can't wait to see the details. Maybe there is an inexpensive way to switch.