Not sure about business but I've seen people do it in other faculties. You would basically be allowed in your program but then be reassessed like usual at the end of the next year, and at that point your grades would have to meet the cutoff. If you aren't allowed into business just go into econ or something for a year and continue taking whatever courses are still available to you from business. Who knows, you might actually like the change
And you can always reapply to re-enter business again after a year in a different program, although you might have to enter as level 2.