I can confirm that Jetstar do indeed NOT give refunds. Had a friend of mine booked back on an evening flight to Sydney from Coolangatta when they decided to cancel the service. You would think refund wouldn't you? No way! Read the back of the ticket and it states 'NO REFUNDS' It also states that although that even though you bought a ticket on a particular flight at a particular time, they are under no obligation to meet that schedule, simply that they will try. If they don't it's your bad luck. I won't go near them now for that reason.
Anyway, the answer is - NO REFUNDS. Read the ticket.
She had to find her own way back that evening on
VB