lost superannuation checking to see if some is mine?

I received a call from this number claiming to be looking into billions of lost superannuation for Australians. Alarm bells went off when he asked me for my name. Not sure if its spam or not...

My mobile rang and I answered, dead silence for about 15 seconds, then someone came on and said he was from ??? (Australian voice), I didn't answer and he hung up.

Annoying number

I keep getting calls and when I answer the line is dead

Called and line was silent - I just hung up

Caller: This number

Left half a voice mail

Called my cell over and over until I finally answered after a couple weeks. Telemarketing. Ugg...

Caller: 0410 314 609

The dude sounded suspicious and totally unprofessional. He goes by ‘josh’ he also called me today about lost superannuation and wanted to check if some was mine as well ?????