This number called then stopped before I answered. This happened 3 times just a few seconds after I called Boost Mobile regarding internet connection.
I have connected to Boost Mobile last night, less than 24 hours ago.

Caller: Boost Mobile

Boost Mobile gave me this number but it rings once and disconnects. Boost is a disreputable company. Don't deal with them

Caller: Boost Mobile (Telstra Pty Ltd)

Boost Mobile (Telstra Pty Ltd) customer service centre. Legitimate.

I called back number (02) 8290 1800 reached voice mail but did not say for what comapny.

Caller: Dont know rang back they silent

Not sure who it was

Caller: I think Boost Mobile

I am having problems connecting

Caller: Boost mobile

I changed my service provider in the morning to boost and this number called me in the afternoon saying that they mixed up with another person with the same name when they enter my info in their data base, the operator asked for my driver licence and completed the process

I called back number (02) 8290 1800 rang once then gets disconnected automatically.