Possible scammer calling to tell me that my internet connection is 'unsafe' and to fix it with him immediately.

Claimed he was from Telstra but was very rude and did not give me his name.

Caller: Alex

Said he was from Telstra.
He then said he had helped me out with problems on my internet a month ago.
I told him that I would ring Telstra myself which i did.

Telstra said it was not them they then blocked the number
IT is NOT a Telstra number. It IS a

SCAM