Dont Fly Quantas

Got to the ceck in dest friday morning to go to NZ Quantas wanted £1100 to take my bike to NZ i tried for hours to get it changed but they would't budge.. The BA girls could not belive it as they only charge £30 and Air NZ only £50.. I even put on there website that i was taking my bike and it never said nothing about having to pay £1100.. So il have had to re-book for tuesday with NZ airways il be out in NZ for the 29th Jan.... Im trying to claim back the cost of my flight from Quantas now....