There's the proof. I asked them to explain more as I was confused by that claim and they directed me to the AMCA website and refused to back up the claim. Can anyone else shed light if this is true or not?
I know personally in the role I am in, if I'm going to quote consumer law and someone questions me on it, I'm prepared to prove it to back up my claim.
First i've ever heard of it, sounds like a bullshit excuse. Is it illegal to match another seller's price for an item ? I don't think so, so why would the same not apply to a service like a mobile phone plan.