Missed call from this number and no message left

Persistent sales person from Sportsbet. Not sure where they got my number.

While air horns and whistles are what they deserve, it's pointless. The electronic design reduces the bandwidth/volume of any noise you make. It doesn't hurt their ears. They just laugh and hang up.

dozens of calls in last week, all stating it will connect, then goes to busy tone...must be SPAM hence telemarketer