I got a voicemail from an interviewer 2 days ago (because I didn't pick up twice) asking if I'm available for an interview the next morning. Unfortunately, I was busy doing work and I had other engagements the next day. I called him up and told him I'm not available. That was the last time I talked to him. It dawned on me that I made a HUGE mistake. This was my first interview-call from an employer and I had no idea that when he Asked if I'm available it actually meant "Do you want this job or no?".
He didn't leave his email and I've already left him a voicemail. SO, should I call him now or will that make me seem naggy? I can't email him because he didn't leave that and I don't want to seem like a creep. I was thinking that waiting too long would make me seem unenthusiastic about the position. Should I call him again? What else can I do?
I really need that job and the application was so long. HELP!!!
EDIT: Sorry Joe I accidentally deleted your answer when trying to reply. After how long should I call again?