I did warn against this happening and asked if anyone had checked with ANZ about exactly how they would apply this D-Day cut-off. It is usual for banks to process the points when the payment is made and not when the purchase was made. I believe their info stated the changes were for points earned after Nov 1, not for purchases made after Nov 1.

So are they playing by the rules? Yes.
Are they being deceptive? Yes.

Sorry to hear you were caught out, but I doubt ANZ will cut you any slack on this one.