I had the same experience signing up Sept. 2019. I was told I would receive my employer discount, then I was denied. I found this out yesterday wondering where my discount was. 

The cust. rep first says it is a problem with the tax ID, then says the plan is ineligible. I was then offered a $25 credit for the "miscommunication" which I have not accepted yet.

If I had the funds I'd sue Verizon.

I hope a legal firm picks up on this and finds cause for a class action law suit.

You can't tell people at point of sale the discount would apply, confirm it via email, then say sorry for the miscommunication, pay up!