I'm on a 6+2 plan, costs 5999 + GST, which is effectively 750 + GST pm for an almost 400 Mbps/3TB connection, double the plan speeds could be a glitch though. They seem to have updated the plans, a few months ago. 200 Mbps costs 750 + GST pm and 300 Mbps for 850 + GST pm.
I wanted to shift mine to 6+2, 850/300 Mbps but no one in Hathway CC has a clue about new plans and they are quoting me 1250 + GST for the same. Will let my plan expire and try to get the same from retention team like mhsabir did.