Feb 1: Answering machine spam: Recording of anonymous woman saying goodbye

This recording also called Jan 29, but I didn't log it.

This recording has called Jan 29 and Feb 1.

"Goodbye."

Why the fuck do they have to do this shit? If there is no answer, why the fuck are they calling again? Why do they leave these pointless messages on the answering machine? Why the fuck don't they identify themselves?