The same thing is happening to me. Repeated calls at lease 4 times a weeks. They always listen then hang up. I now let it go to voicemail just incase they try to steal your minutes and personal information when you answer but they never leave a message
They're idiots. Called me 7 times this morning all before 9:30 am so I call back & they say they're "trans load systems"?? I don't even know what that means lol could barely understand her on the phone.