Caller: scammers

Told me my phone is going to be disconnected, if payment is not made !

spam for sure 3 calls in 1 week

This is an obviously spoofed number. I turned off my caller ID and called it back, only to be told that my "Call couldn't be connected. Please check the number and try again". They've also clearly obtained a pool of similar numbers to scam us from, because not long afterwards, I received a call from another number where only the last two digits were different.

Caller: scammer

Told me he was from Telstra and has located suspicious activity coming from my IP Address

called, came up as spam, no message left

Called, no message left. 1 minute later received another call from slightly different number (03) 9316 9212). No message left again. Most likely spam.