They knew my name and claimed to be calling on behalf of a government department offering incentives for retirement savings to those who already have +$150k in super.

Really?

Told them I was uninterested and to never call me again, number blocked.

Persistent calls from unknown calker who won’t identify themselves. Finally a accept or deny call. Phone hung up. Suspicious

Answered the phone but they hung up, tried to call back and it does not connect. Scam??

Called back number - phone had incoming call restrictions. Now blocked!

I rang back 0449 093 185, spoke with someone who hung up right away