He told my son that he was from Telstra and there was an issue with the internet in the area and he needed to download "team Viewer" on the computer after that the computer would not connect to the internet.

Rang back, no answer. Spam

Said they were from the technical department and a website I have visited has a virus and is now in my computer. When I told them I don’t have a computer they hung up on me.

Does not respond when I answer but after a number of seconds female recorded voice says "goodbye". Web search is for Lever Concept Constructions, but no answer.
ATM 'nuisance call' till I find otherwise.

Same as previous comment. Wanted to speak to the owner of the service.Told him that it was a Business Number that he called and that the owner was not available. He then hung up,

I called back number (03) 5022 1062 rang 5 times then goes to busy tone.