Jetstar is terrible

I booked a Jetstar ticket to fly from Melbourne to Ayers Rock when they had a sale. And then I got 9 times changes. I felt every 1-2 week, they send me emails and txt messages to notice there is some change on my booking. It’s frustrating for me. How could someone has effort to deal with 9 times change and reschedule other thing around.

I felt I was trapped because when I bought they didn’t tell me they may change unlimited times.
Otherwise, I won’t buy it.

Australia-Melbourne - Tullamarine