Caller: don't know for sure but believe it's a scammer

I've been receiving phone calls from lots of different mobile number for days now. I just checked the above number twice and it's busy. Yesterday, I finally answered a call and it was that 'Your internet connection is going to be cut off' scam that's been going around for ages. I also called back mobile number 0469 994 191 that came in a couple of days ago and it says that it's not connected now. Scammers for sure!