Justfly Complete rip-off for any flight changes Los Angeles Internet

Booked a business class ticket from Atlanta to Perth, Sydney and back for around $9,000 which was reasonable.  I needed to change the return date by 3 days and the quotes for the change fare ranged between $6,000 and $7,000 although I called on multiple days spoke to multiple people holding on for hours and being told that if I call back the foillowing day they will have cheaper change fares available.  This never materialized and the agents on the phone were completely unhelpful and all seemed to be of Oriental origin which made communication very difficult. They never made an attempt to provide any reasonable change far or alternative.  I will never use this company gain and unless you are certain that you will not need to change your flight I would advise others not to use them too.