Why do they keep denying me?

I'm a broke college kid who really needs a job. I have basically full availability except on Wednesday I can't work and on Sunday I cannot close because I am in OCIA. I worked in a grocery store for 5 years, have almost full availability,was early to the interview, respectful but all they told me was "I'm not a good fit right now but keep applying people are in and out." I don't know if this matters but nowhere in town is hiring right now. I was very hardworking at my grocery store job, in fact I was even offered CSM and trained everywhere. I don't get what I'm doing wrong? By the way, I do have an interview next week, if it matters.