Scam. Received call on my mobile claiming to be from Telstra and telling me that someone was trying to hack my internet. When I questioned the caller I was put through to a "supervisor" who gave me his first name and employee number. Was very persistent. Told him I would have to call him back and asked for his number. He would not provide it and said he would call me back. When he called back I did not answer. I then received three calls from three different mobile numbers in quick succession. 0406 816 027, 0442 412 672 and 0420 299 165).