Kolkata

Kindly specify your location as you haven't mentioned anything in the question neither tags.

Of course, you can get admission into any top college, because class 12th percentage doesn't matter and all the reputed college has entrance exam.
I hope, you did well in your entrance exams. Never lose hope. Even if you couldn't manage to grab a seat for BBA, then try and make your goal to crack any competitive exam for MBA, because what matters is the position you reached at the end and not what was beginning you started from.
All the best.

Hi,
M.Sc Environmental Science in distance education is available in Vidyasagar University Directorate of Distance Education, Midnapore, Kolkata.

Diploma courses in NIFT range from 3moths-1year and they hold good value. The campus placements that NIFT has to offer are tremendous. The college is well linked to the industry, through internships and jobs you can make contacts that will allow you to establish yourself in your field of expertise. Best of luck.

Hi Siddharth,
As your rank is very low, and not good, so you should try to drop only if you really want to pursue engineering from a best institute otherwise you can apply in private colleges for engineering. I am sharing a link below which will help you
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-india-accepting-jee-main/44-2-0-0-6244
Good luck.

I request you to mention the course details clearly, so that I can help you with it.

Jadavpur University, Kolkata
Heritage Institute of Technology, Kolkata
Techno India University, Kolkata
University of Calcutta, Kolkata.

Refer to the link below for the same:
https://www.shiksha.com/mba/colleges/mba-in-digital-marketing-colleges-Kolkata?rf=searchWidget&landing=ctp.

Acesoftech, SevenBoats Academy and Calcutta Media Institute are some of the good colleges for digital marketing.