Xfinity agent lied to me

I called to change my plan, and the agent pitched a "bundle" that included internet, video, and a mobile phone.  They said that the phone would be free (similar to other carriers), and also that service would be free for 12 months.

They sent the phone, but now I am being charged for the service. 

So, I am trying to cancel the service and return the phone... but I've been in Live Agent chat hell for an hour, passed from one person to another. 

It's just awful.  I think the only option I have at this point is to claim fraud to my Visa company.  But I'm worried that will affect internet also, not just mobile.