I called back number (03) 9581 2613 reached voice mail but did not say for what company.

Called back (03) 9581 2613 and went to a voice mail with no identification

Missed call, got a 'hang up message'. Called back, went to a voice mail that only said something like, "the person at this extension is not available"

Got a call from this number just after 6pm this afternoon. Answered the call, but was immediately hung up on

Same thing with me, got a call and the number hung up on answering . call back got a Message service

Energy company offering savings on your bill

Cold call nuisance. Return call goes to automated message that doesn't identify the caller.

Telemarketing.

Woman asked if I wanted a discount for energy bills but the second I said I am the one who pays the bills she hung up immediately and didn’t even say thank you or goodbye