The supplementary exams have been postponed in Karnataka state board, what do I do about college admissions?

Asked about St. Joseph’s University - B.A. in Optional English, Journalism and Psychology

Under family pressure, I chose science in 12th and failed in maths and chemistry. I was interested in a creative career and want to do BA in journalism. I am certain that I'll pass on supplementary but the exams have been postponed to July and in most colleges, admissions have already begun.