claming to be a company on behalf of the government giving energy saving products to businesses

Never ever leaves a message. Rings several times a day

Claimed to be from Clean enviro.
If you ring the number back from private number, you will get elevator music asking you to stay on hold and they will be with you shortly. Than a recording states "we are sorry we are unable to answer your call, please call back later.
Definite scam!!!

Claimed to be from Optus with a special offer. Wasn't convinced