to try the Android Device Manager try this link
If for some reason the link doesn't work for you then google "android device manager" and click on it. You'll log in from there.
once you log in hopefully your phone will appear as one of the available devices. If your phone is listed you can then pick from "Ring", "Lock", or "Erase". For the erase function to work I'm pretty sure you have to have that option enabled in your "Google Settings" app.
Good luck. Hopefully this works.
The device manager is a great tool and it's a shame that more people aren't aware of it. Reps at the VZW retail stores should be required to make customers aware of this every time a device is sold.
I've had to use it myself once and I always tell my friends and family about it whenever smartphones are mentioned.
Did you find your phone? If so, did you use the Android Device Manager?