Want a DEP discharge from Navy because of recruiter's lie?

I was told that if I joined the Navy I could pick a job that ships out sooner and then cross train into the job I wanted. I wanted to do this because the job I wanted had a ship date 7 months away from the day I enlisted. My recruiter said I could cross train after 18 months in the Navy. My dad who is an O-4 in the Navy and a former recruiter told me that it takes 2 years after your "A" school to apply for a new job and even then it still takes another year or two. On top of that it would not be guaranteed that the job I wanted would be available when I wanted to cross train. I have informed my recruiter about this and that I think he's lying but he denied it. I just want to get out and join the Army because I can't take the lies and all the time it's taking to do this. It's time wasted that I could be using for college. Is there any way I can get a discharge without them delaying it up to a year, so I can join the Army and leave.