I'm trying to get an updated version of my addon submitted on curseforge and the file keeps disappearing. Whenever I uplaod the same one again it says that I am trying to upload a file that I've already uploaded.  I submitted a ticket on curseforge and the ticket disappeared. Please help!

Files aren't disappearing nor is your ticket.  Your issue was answered in the original ticket you posted:

http://www.curseforge.com/projects/curseforge/tickets/1939-uploaded-files-disappearing/