I found the Jetstar website incredibly awkward and 'clunky' to use.
I booked a package deal including return flights for two people and accomodation in Sydney for one night as I was attending a Business function. The booking was made and I printed off the details which confirmed the booking for both the return flights and the accomodation however, unfortunately when I went to pay using my Visa card payment was declined.
Now admittedly this may have been an issue at my end as I had just recently received a new card, however I did try on subsequent days...at least three times and couldn't access their web site preferences? It just wouldn't work and was obviously not functioning properly. I was not particularly concerned at this stage as the print out clearly stated the 'Confirmation number: and 'Amount due at pick-up / check - in' .
Finally the day prior to leaving I decided to try one more time and then contact Jetstar if it didn't work as I was intent on having this paid for prior to the flight and to avoid any potential inconvenience on the day. To my dismay, when I spoke with their Consultant she told me that there was in fact no record of the booking and I would have to rebook both the flights and the accomodation!
Another four hours later after having to reconsult with my colleague and search for flight availability and accomodation I was luckily able to secure both...unfortunately I had to pay an additional $ 82 for the flights and $ 86 for the accomodation not to mention the inconvenience and associated stress and lost time!