Said they were from my internet provider Telstra & that there was suspicious activity for the last 12 days & are you near your modem & computer? I can show you how to block them. Said no,I was busy where are you,whats your phone number I will call you told North Sydney (02) 8091 1672. Rather insistent are you near your modem & computer again. She said I will ring you back in half an hour.No I said I will ring you. Watch out another way to get into your computer