Jetstar worst

I booked the flight Sydney to Darwin for Oct 2020. We not comfortable to travel since we heard the cases in Melbourne. And we thought it a better to travel next year. And call Jetstar to cancel the fight to get credit due COVID 19 And talk to Ali who is rude and not helpful. He told us if we cancel it we don’t get the refund and also the flight is on Oct 2020. I think it is unfair that seems force us to go on Oct 2020. We don’t mind to get credit.