Recieved call but no one on the line, called back after they hung up and it rung out

The guy said his name but cant remember. I just told him I was hanging up.

I only saw the number when it rang: I answered the first time but seemingly there was no one on the line. I just let it ring the second time. What time-wasters .. don't these people have anything better to do ?

When I called it back, I got a message (tried twice, same response) saying that the number had been disconnected. How odd, given that it was the number that rang me less than 10 minutes before that!

Westpac general insurance calling about a complaint i had lodged.

Phoned at 8.30pm and advised he was from Westpac & was just checking on new account. Tried to play a recording but did not work. I told him it was to late for call. Phoned Westpac no. and they were closed for the evening.

I called back within minutes and it said call cannot be connected.

Obviously a scam or telemarketing but unknown which,

I called back number (02) 9155 0000 rang once then goes to busy tone.