Laugage Price Gouging

After flying to Launceston with Qantas on the weekend I decided to fly back with Jetstar due to timing. What a mistake. I booked the baggage on my phone and thought that the $25 fee for oversize baggage was great. Half that of Qantas. That's where I wrong. This was just a handling fee. They charged be $375 at the airport despite making the booking it was just a handling fee. The insult only continued after my sons bike bag the one we just paid $375 for was left behind. There was no one at the service desk in Sydney and it took over an hour and a half to find staff fill out forms to leave the airport. I have contacted Jetstar since and told they don't refund or appoligize apparently. This is blatant price gouging of the unaware.