USMC boot camp date set, recruiter says i am probably leaving in 11 days? do i have the choice?

i just enlisted to DEP a week ago and was set to leave may 2nd, my recruiter called me 2 days ago and said i hav a good chance of leaving january 24th cuz the kid who was suppose to go hasnt gotten a waiver approved, is it my choice to go on my original ship date or can my recruiter change my date and i have no choice?