Claim Credit? - no payment authority form

After several delays we were offered a phone credit and dinner to $35.
They do not have a payment authority on their website.
The "Customer Care" centre tell us it is "not their department"!
We have to drive back to our nearest airport - 140km round trip - to pick up a form from the Jetstar counter!
Even if we considered doing this we doubt that they even have such a form at the airport.

Has anyone ever claimed a phone credit or dinner costs from Jetstar?

Where do these forms really exist?

International
Vietnam-Ho Chi Minh City
Australia-Darwin