They left a message asking me to call them back. Fat chance. 800-410-3437

Called and left no message but did the "press 5 to send your number to this voicemail" thing and I got a text with their number.

They called me and tried to collect on a bill.  I don't even have an account with them.  when I called them back they asked me if I wanted to lower my mortgage rate

Called once and left message. Female voice with echo, asking to call 800-279-3480, no details.

Caller ID said 800-410-3437, but they left a message saying to call 800-279-3480, which seems to be Alliance One Receivables Management, who have questionable history of doing business. No details of what they were calling about.

Called me twice in the last 2 days. Did not leave a message until today,but the message was "blank" as if they did not know it had picked up. They disconnected the call without saying anything.