Crown Currency Exchange (Aspley Hypermarket)

I made a HUGE MISTAKE buying my foreign currency at Crown. Yesterday I bought South African Rand 7,000 and was charged $771
I checked at Travelex and could have bought for $595
When I complained it was futile. These people just don't care. This is not some third world country, you expect to get a fair deal. But to get stung an extra $176 on a small deal is just plain outrageous. DO NOT USE CROWN