This is Open Agent. They don't bother to leave a voicemail, just call and hang up, call and hang up. So rude.

Very annoying company that calls then hangs up when you answer. I called back and yes someone answered being from Openagent

Had a look at the open agent website entered my phone number as part of the registration. Found the costs involved with using their service and are no longer interested but continue to get calls after ringing them to remove my number from their system. The next phone call I receive I will contact the telecommunications ombudsman. Not the slightest bit happy with them. I would never use their service in a million years after this experience.

Keeps calling on different numbers - hangs up

I called back number (03) 9006 9941 spoke to a woman who said company name is Open Agent.

Same here. Better to forget