This number calls multiple times per day - I screen so dont answer

calling nonstop, no one answers.

They are claiming to be Simply Energy. I told them that I was interested, but would look into it and call them back. She hung up on me. They can't be too genuine if they don't even give me some contact details.

calling nonstop from several different numbers.

telemarketing

I have had a gut full of these callers. We need to invade Telstra with complaints and lists of numbers to block on our lines. Maybe we need to start harassing local MPs as well.
The worst most recent was the pushy, rude Indian woman claiming I was owed bank charges refunds.....she had all my details - full name, address, DOB . She even asked why I didn't trust her FFS. Lodged complaint with Telstra to trace

I called back number (08) 7123 4374 just kept on ringing no one answered the call and never got any voice mail.