Who called from 2067081496

they will not stop calling me. i answered finally and they knew my name i have no idea who they are and why they keep calling me from seattle washington. it goes straight to a voice mail if i call it back.

they just call my cell and told me that i had won a prize for using visa credit cards but i don't even own a credit card.....

The same thing is happening to me they just keep calling and when i call back its a voice mail who is it?

They keep calling me, but they always hang up once I answer.
Whenever I call back, it immediately goes to a voicemail box.