Caller: One of those energy comparison companies

They knew my name, and started talking about how I'd apparently promised them last year that this year I'd be interested in a call from them? I did no such thing.

Calls everyday, leaves voicemails with silence.

They ring every few days, no message, no caller ID just silence. Is a spam caller 100%

They call each day (sometimes multiple calls) and leave a voicemail with no message. Also call landline but hang up with no message.

I get a call from them almost everyday. When they leave a voicemail it doesn't actually say anything.

No idea who they are no message left but going by above comments glad I didn't answer

keeps on calling me every few days and leaves seemingly a voice mail. But when I play it it's not a message. No voice, complete silence for 25sec and another 45sec. When I called back got voice mail, not stating who they are. From above comments, these might be wealth management people offering a 'seminar', or personal advisor.

They obviously did not really want to talk to me as they did not bother to leave a message. I do not answer unknown numbers for that very reason. Reading other comments suggests that I would have wasted my time answering them.

I called back number (02) 9171 7920 reached voice mail but did not say for what company.