Which Australian ISP has the best customer service?

Which Australian Internet Service Provider (ISP) has the “best” customer service?
I’m glad you asked.
By my measure, Westnet utterly dominates the ISP customer service landscape.  All other ISPs simply pale in comparison.  Perhaps there’s something special in the Perth drinking water supply that makes businesses more people-focussed, because my second ranked ISP, Amnet, is also based [...]