Serious risk of booking errors on Jetstar's web site...for which YOU have to pay

BEWARE OF ERRORS ON JETSTAR'S ONLINE BOOKINGS. I have just had one of the most outrageous customer service experiences I can remember. I booked a flight with Jetstar and have the screen showing the confirmation...but when the email confirmation came they had put me on a different flight. I called their customer service and they told me there was a "web error" -- fine, mistakes happen. But even though the original flight is still available and at the same price, they refused to make the change without charging a $50 fee!! FOR THEIR INCORRECT BOOKING! The customer service people even told me that they cannot guarantee accurate bookings online -- something to the effect of: "We always recommend you call us instead [for an extra phone line booking fee, BTW]". This will be the first time I fly on Jetstar. It will also be the last. Save yourself hours of hassle. DO NOT BOOK with Jeststar online...or at all.