Since you applied for OJEE for an MCA but now wish to pursue an MBA, you have a few options:

1. Reassess Your Decision : Ensure that pursuing an MBA aligns better with your career goals than an MCA. Reflect on your interests, career aspirations, and the kind of roles you wish to pursue.

2. Proceed with MCA and Transition Later : Complete the MCA and gain some work experience. You can then pursue an MBA later, possibly with more clarity and experience, which could enhance your profile.

3. Simultaneous Preparation : If it's early in the admission process and you haven't committed financially or academically to the MCA program, you might consider preparing for MBA entrance exams like CAT, XAT, GMAT, or MAT. Many MBA programs also have admissions in multiple cycles, giving you flexibility.

4. Contact OJEE Authorities : If you've recently applied and wish to change your application, contact the OJEE authorities. Some entrance exams allow modifications or provide guidance on how to handle such situations.

5. Look for MBA Programs with Later Deadlines : Research MBA programs with application deadlines later in the year. This can give you time to prepare and apply.

Ultimately, the decision should be based on your long-term career goals and interests.

hope this helps  you!!