Called but left no message. looks like a scam, just block the number.

Unidentified caller

Caller: Eco Energy Experts

Have received four unsolicited calls from different but similar numbers in the last two days. Call centre that only connects to a telemarker after you answer. The person said they were calling from "Eco Energy Experts". I did not wait to hear more as I've heard this spiel before and it's spam.

Eco energy rebates

No message left

This seems like a scam, I received a call from the number trying to tell me there was a rebate on electric heat pumps for my hot water and they were calling from 'Eco Energy Experts'. When I asked how they got my number they said that they were calling on behalf of the government and the government provided my phone number.
I ended the call and decided to call the number back to see who answered. I was greeted with 'thanks for calling back' and when I asked where they which company they were calling from and if they had a website they disconnected the call.