re: Was I in the Wrong?

You being "wrong" implies that Verizon is in the right, which I disagree with. They seem to suck pretty bad here. But you definitely acted like an arse.

Even if they completely fumbled and jumbled the entire process, they said you'd need to take the device back with you. At that point be frustrated all you want and make plans to come another time, or go to another Verizon store, or sit in your car and call corporate. But to leave the device there after they specifically told you to take it, and after they, in your own words, were SHOUTING at you "sir you have to take this!!" as you ignore them and walk out like a movie villain...yeah you look like a dick.