the line was busy as I tried to call back. No message was left since I don't know who was calling.

Rang out, and then "left a voicemail" of nothing, no sound whatsoever, i didnt call back

Spam caller

When you call back there’s just a recorded message saying all operators are busy and then it hangs up. Possibly a place that gets paid for how many returned calls they receive to use to Harra

New phone, New number, same telemarketer