Name change rip-off

Jet Star is ripping customers off and has zero interest in return business. We were charged a massive fare difference for changing 1 passenger!
We booked two flights on the same booking two months ago Melbourne to Hobart return on a Starter fare to do a bushwalk. My 15 year old nephew hurt his back and needed to pull out. I wanted to replace him with my daughter. The Starter fare permits name changes “upon payment of the applicable Change Fee and Fare Difference within Change Deadline”. We were informed that the name change would require the issue of a new booking and that this would mean we would be charged a $70 name change fee, and a whopping $242 fare difference fee for each flight, hence an additional $624 charge! There was no change in itinerary and no extra people on the flight just the replacement of one name with another. Steer well away from Jet Star – they hide massive fees well from view so that they can gouge as much money as possible out of the public.