Calm down @abhay-singh-f0hwl
Indeed it is hard and truly challenging to study a course that we are not very much interested in. But you have done that!!!
What happened has already happened and we cannot do anything to change that. And thinking about past is not going to help in any manner except taking you into more pain and depression. But we sure can act to improve our present and future. So, act more and think less!
Now friend, few questions you have to ask yourself are whether you are interested in getting a job in computer science, or what other areas are you interested in. Only a few IT companies go for keeping percentage as a criteria during the selection process. Banks, upsc or most other govt jobs don't have a percentage barrier. So would suggest you to review that information. And once you gain some experience, even most of the top companies and colleges would welcome you to join them.
And who cares about top MBA colleges? Rarely any of the top tycoons of any field are from the top colleges. You too can create your future. You just have to start taking action and move ahead. You want to go for a TC job, go for it. Apply, prepare and appear for the exam. You want friends? Go out, get involved in activities of your interest. Try to talk to people and you sure will have friends. You have to break your comfort zones and take some risks.
Connect with anyone here for any kind of further suggestions! All the best!