they ring everyday even after u ask them not to call

I called back number (08) 6594 3014 spoke to a guy but did not say for what company.

indian call centre about power bills

Spam about solar panels

spam

Caller: Not sure - sales company.

Off-shore company calling people via Rottnest Island in WA.
Calling multiple times a day, then hanging-up upon answering.
Called number back and eventually answered to a sales company.
Tried blocking my Caller ID by using *67 prefix, but it won't dial.

power sales as usual
every bloody day

Any idea who are these people keep calling me more than 5 times every day without leaving any voicemail

Telemarketing crap