Rang back, recorded message from Optus saying number disconnected

Had 2 missed calls from this number. I blocked my calling number display and attempted to return the call to see who it was, but got a message saying 'this number has been disconnected'.

Rang back was disconnected.

don't know you

Finance/Insurance company pest.

Rang back and was disconnected

A message was left, but when I go to play it, its just a blank message

asked if I was aware of the insurance benefits within my superannuation account. Advised that I was and was then they asked when the last time it was that I had my superannuation and insurance reviewed by a financial adviser.

I called back number 0417 868 937 rang 5 times then goes to busy tone.

was a finance company who was rude

Said she wanted to talk to me about financial advice. I said I did not need any and to remove my name and number from whatever list she is using.

I called back number 0417 868 937 reached voice mail but did not say for what company.