Flying to Caines

I’m really need to put my air line ticket on hold that I have on Monday 2nd April The 24inches of rain is preventing me to travel to my area in Far North Queensland. I don’t have a date atm to change my ticket. I can get any proper answers from s Jetstar rep
My email isroz@sdtlp.com.au my phone number is 0411850096. Will some one in Australia contact me please. Travel is Sydney to Caines

Domestic
Australia-Cairns
Australia-Sydney