Promise to pay for hotel accomodation and meals, now won’t pay.

We arrived in Sydney, after being delayed in Bali overnight as they couldn’t find enough crew to staff the plane.
Due to this, our bus tickets to Canberra were cancelled, and no buses available to Canberra that late at night. Contacted a Jetstar representative, who in a chat transcript pre approved accomodation to $200, meals to $90.
Guess what, now refusing to reimburse us. And our new and old bus tickets , of course not. The $200 extra for Bali Visa’s , Nup ! Out of pocket around $700, plus lost a days pay.