As a given, I will never go to this place again for a haircut.
I was told that I had to pay an extra $3 if I wanted to pay by card because "It's how the machine works" which was a standard Commbank Terminal. There was no signage indicating this ~12% surcharge. This happened today, Thursday, where it is not a public holiday or Sunday in NSW or anywhere in Australia.
If it's not shown, then you can report them to the ACCC.