Who called from 2135371393

My phone rang with 213-537-1393 on the caller id i answered they asked for me by name and then hung up

I keep getting called by this number and there is never anyone there and I can't call back it's always busy. It's driving me insane and killing my minutes.

this number called my phone but I can't seem to figure out what it is? Does anyone know?

keeps calling...over and over. You can never call them back.  Number is always busy.

Keeps Calling but, there's never a voice on the other end.