The feedback I give below is rooted in my own experience, going through all years of school and employment - when I was always expected to provide something.
I am not able to sleep. For the last 15 days I haven't gone out for shopping or anything. Eating just a little bit of food only one time. Talking to no one, my family or friends.
Well, that is the perfect recipe for disaster. How do you expect your brain to function properly (even, better than properly, since you are trying to do a highly intensive task) without caring for it? Go ahead and eat nutritious food, have good rest, do some exercise, and then things will definitely improve.
Just sitting all day in front of the screen trying to find some kind of breakthrough.
With a under-nutritioned, not rested brain? No way.
Moreover, a thesis (regardless of the level) implies research, and research means that you can (and sometimes MUST) cooperate with other people. Go ahead an talk with anyone who might be able to give you some idea. Even terrible ideas can turn into genius ideas.
Corollary: if you have no benefit of staying in front of the computer, do something more beneficial. Even sleeping is better then torturing yourself uselessly.
I think i am going into depression. I am afraid that i will fail this thesis.
As I said, good food, rest, exercise... It will go away.
I don't know what to do? How to do? Who to ask for help regarding my thesis and topic.
The thesis is not something that you do in a toilet and you must be alone.
A thesis has at least one coordinator (provided by the university).
In your case, there are two coordinators, the other one being assigned by the company.
Each of them will provide you with support according to their area of experience / expertise. Even if they do not push or pull you about the work you do, be PROACTIVE and go talk to them. Tell them about your results until now. Tell them about the problems encountered. Ask for help. Ask to be assigned to other specialists which might have good feedback which you can use.
I am constantly worried about what if i fail. What will happen. Should I have to go back to India without completing my Master's.
Leave the worries until after the final exam passes. How can your brain think about the work you need to do, if you keep it busy with analyzing ways of failure?
- provide the best conditions to your brain to function at maximum capacity;
- remove from mind all negative stuff (worries, fears, negative emotions...); they will appear independent of your will, but when you become aware of this, push them out
- be proactive and be in regular contact with your supervisors;
- be proactive and seek help / information / ideas from anyone who might be able to provide them;
My own case: I am able to ignore all the negative stress before a serious endeavor (exam, delivery of project, preparation for some bigger activity...) - even to the point where I feel too "free". However, once the event passes entirely and the really final results are in, my brain suddenly releases all the energy and the feelings and everything which I ignored previously. Physically I become weak for a few seconds / minutes. On rare occasions, I needed to sit for a minute, to recover.
That works excellent for me, and I would never want to change that. Even though the feeling of weakness is not something to be proud of, it allows me to really concentrate on the task and deliver maximum performance.