Caller: They claimed to be from MYGOV

I received a text message fraudulently claiming to be from MYGOV advising that I have a $900 tax refund and to affect transfer of funds I need to click on the link provided. This is a full on scam to get hold of you bank and personal details - DO NOT CLICK ON THAT LINK. Block number immediately.

they sent
Bendigo:A payment was attempted of $90.99 to Jay Huss on 17/07 from your account.If you did not make this please visit http://bendigo-payment-cancel.com
I blocked the number

Caller: Optus

Just got a msg saying my Optus account was at risk of unusual activity...to verify details via optus-supportcentre.com.WEIRD!!.After read above msg ..just confirmed suspect..thanks for the tip.

SMS message claiming to be from Commbank and claiming that I update my personal details urgently or my account will be restricted.
Funny thing - I’m not with the Commbank. I got a similar sms a few days ago and blocked it and I have blocked this.
Where do these spammers get their hands on so many telephone numbers???