'technical department of micrisoft' scam

Caller: Spam

I find it hard to believe that there is no way these calls could be traced in this day and age of technology.

Caller: "technical department of Telstra" Scam

Said that i have suspicious activity on my internet account and I need to make a payment to rectify this - I said I'm not with telstra nor do i have internet service with this number - she said all internet in Australia is owned by Telstra and I do have an internet account and there's suspicious activity on my account I told her I will report her for fraud and she quickly hung up

Same - Must be a 2-step operation. 1st scammer's job is to run through lists of random (but feasible) phone numbers - they found mine despite being unlisted. This allows them to flag it as human (as opposed to machine or "M2M")
Maybe they have a means of detecting ISP connections to phone lines?
I see on youtube that their usual trick is to get the unwary to enable "remote admin" on their PC so the scammer can take control. They (or get the user to) bring up a command prompt ("DOS window"). They falsely claim to be scanning the system for viruses but run something guaranteed to take several seconds (or minutes) like "tree" (after switching to the root directory of C: drive) which simply lists out the directory structure of the whole disk but takes long enough for them to type some bogus warnings of supposed virus infection while the supposed "scan" is taking place.. Their bs text (like, "TROJAN" or "VIRUS ALERT!") appears next to the command prompt when the the tree command finishes. They run something like "syskey" which enables them to lock the user out of their own system while a ransom is demanded. I won't fall for it but it makes me pretty angry that they take advantage of the well-meaning and unsuspecting average user.

Caller: Automated phone call

We are about the disconnect your Telstra internet.
For Sales press 1
For Technical support Press 2
You get the idea, I just hung up!

Caller: Indian call centre

Same as "Anon" above.
Suggest you tell them that they are not Telstra and to get lost!
In Hindi:- "Tum Nay Telstra hai! Jow!"

said that someone hacked into my Telstra internet???!!

Answered call - there was a delay and then hung up