Verizon math can be a little wonky sometimes: https://verizonmath.blogspot.com/

"was told" means nothing. If you don't have it in writing, they can say anything. One time when i was contacted by sales to offer me a "new better offer" i asked to send it to me in writing and they refused, because "policy".

p.s. this is noname local provider that you have never heard of.

Even if you have it in writing, you need to have the tenacity to hold them to it in court. They can do the fun corporate game of “computer says no” and defy your written agreement as a gamble that you’re not willing to spend time and money suing them.

And there will be some fine print on the website that says "Only SVPs and CxOs have the authority to bind us to an agreement."

Oh, I have it writing. A screenshot of the order, an email confirmation, and a physical letter. All directly from Verizon, all saying $160.