When I was asked if I could still work, I said I'm not sure yet becausee of my study schedule (meaning I didn't know if I could work full time or part time).
part of being eligible is being ready, willing, and able to accept a job. Your answer removed you from those requrirements.

applying for a job is only part of the equation. Until you can convince them you are not taking, or intending on taking school instead of working, they can and will continue to disqualify you.