Victoria Park Continental Food

I just went to this shop liking for spices. The selection is very limited. I bought one item, the packet said $4.50. I handed over a $5 note. My change was 20 cents (coin was face down). I thought maybe it had the wrong price tag on it. When I left the store I turned the coin over and i realised it wasn't a 20 cent coin as it said 50. A round 50 cent coin. As I looked at the coin some more I flipped it over and it said "New Zealand". This man deliberately gave me foreign currency which has absoletly no value here in Australia. He knew it was foreign currency because it's the wrong shape for a 50 cent coin and he handed it to me in a way that I wouldn't automatically recognise it as foreign currency. Very dodgy. I won't be shopping here again.