Most likely the verizon tech had your customer reset his dsl modem.
You need to connect first to the modem and change the setting from DHCP to bridge.
You do that by connecting the pc directly to the dsl modem and accessing the configuration menu
After you have set the dsl modem to bridge then you can setup your router for PPPoE connection put the verixon username and password and you should be able to connect at that point