Admission into IIM

Hey everyone,
I have a very shitty past academics, I have 3 years break before 12th, and my score was 59.6% in 12th. In the meantime, I had a startup and the firm was registered in my name, It sustained for 2 years but failed. Then I did my Undergrad from distance since 2021, and since then I am working at my family business.
I scored 91%ile in this year’s CAT, I have no converts yet, and sceptical about future converts.
The question is, Shall I go for CAT again, if I can get BLACKIS or shall I drop my plan of MBA, if there’s no margin for such profiles?