Well if you have an old unactivated verizon phone, you can still dial 611 for customer service. Perhaps CS could activate, or they could transfer you to activations?
I'd be calling from my iPhone 4 with my number to try to activate the iPhone 5 for that same number. I just opened the box and the instructions that come with the phone say that you have to call from a line other than the one being activated so I'm guessing I'm going to have to wait until I get access to another phone later.