Same as (03) 8202 5424 - didn't leave message and when I called back the ring tone was strange and eventually went to a message with a female voice saying "good bye".

Energy

Caller: (03) 8820 8588

keeps ringing but no one is there when I answer.

Also had the same call from (03) 8202 5424 the day before who didn't leave a message, also when I called back the ring tone was strange but I didn't stay on the phone long enough to reach message bank

Seemed creepy

SCAM - Supposedly from an electricity company that will offer you cheaper electricity because of nature - asking for full street address and personal details

Received the same number (03) 8820 8588 twice today, missed the first one but one answered the 2nd one they just hangup the phone. maybe better not call back to this number if you have received it.

spam

I called back number (03) 8820 8588 rang 5 times then goes to busy tone.