JQ522

I took this flight from melb to sydney on 25 January at 7:40 pm. One of the staff came yo me and asked to show my borading pass. There were another person who was given same seat number. When i checked my boarding pass, there waswrong name on it. The crew started verifying with ground staff which in turn confirmed that i never bought any ticket frim them at first place. Luckily i had my receipt of payment which i showed to them. They finally came back and changedmy seat to 16 c, without checking that there was already a person sitting. Then she moved further to check if there is any empty seat. This added on my frustration. Finally i got an isle seat and one of the staff member came back to me saying that it happened as i preponed my ticket. So it was my mistake that 3 days ago i changed my ticket. They never apologise and were rather rude to me. What kind of hospitality is that. Jetstar doesn't deserve to be in this market, if they donot know how to mak their customer comfortable and how to apologise. I Will Never fly on Jetstar again..!!!