They've called me 6 times in 2 days. And my bill isn't due for another 5 days so it's not about that.

This is Verizon Wireless calling because you are late on your bill. Usually when you receive this call you have about 2-3 days before your service is interrupted.

This is a call from VERIZON WIRELESS. When I answered it hung-up on me (twice). When I called back, it's an automated system that asks you to enter the number you're calling about.