Who called from 8782051021

On my cell, I did not answer.  They left no message.  Sunday, 6:31pm.
(Thanks to all contributors for the information)

Constant calls and hang ups

Called no message left.

Declined the call.  It went to voice mail.  A voice said, "This is Stan.  Hello?  Are you there?"  Then silence.

Did not leave a message.
Calls my private non published number at various times of any day!