lost baggage

On my way back Singapore to Bangkok on 29 November. My flight is 10.30 am. I arrived airport at 8.30 am. flight delay to 1.30 pm. no one told me about the delay when check-in or email notice. I almost the last person boarding, a guy stop me a few steps before entrance to the air plane. He told me that there are no space for my hand carry baggage it better load in the plane. I just gave him without asking tag. Until now I didn't get back my baggage and no contact back.

If I had read don't fly jetstar.com before I will not fly this airline. What a shame.