Sumon ahmed

Hi all, I am new here. I applied my ens 186 visa oN 15th of march 2019. In my immigration acknowledgement letter there is TRN and APPLICATION ID number missing. I asked my agent to provide trn , they informed me ,they cannot provide trn. Is there have any option to hide trn number during the application. My agent told me, they hide trn number. I think they are liying. Advice pls