Sometimes just going to the office is the best. I was a Marine enlisted recruiter, and even if we weren't in, our cell phones were posted on the hatch.
Otherwise, remember time's are tight and no one's guaranteed a spot. The applicants that got less attention from me were wishy-washy, a pain in the neck or nearly DQd for medical/moral issues, but still thought they we're God's gift to the military.
And, of course, you could just have a bad recruiter, a bad number or a recruiter on his/her way out the door. Just go to the office and find out. It's your (my) future.