Can I write a thesis without any help from others? If I can, how? I cannot get any help from my supervisor if I want to write a new thesis. Not only that, I didn't have anyone in my lab. Therefore it's obvious that I don't have any people who can help me here. I'm trying to write it again by myself.

Is it that impossible? If that is the case, what can I do for it? Or should I just give it up?

Thanks.
A degree is awarded by a university. So you can't get a degree while completely ignoring the university. The problem for us is that the exact rules differ substantially between countries and universities within countries. So we cannot give you any concrete advice. 

However, there are typically student advisors at a university whose job is to help you. These are typically people who help students with all the formalities, help with study specific choices, help students who want to go a semester abroad, for bigger problems help the student find the appropriate person in the university, etc. So that would be the first step for you to take. Find that student advisor, and talk to her or him. (S)he will probably tell you that you need to enroll again, and the steps you need to take to find a thesis advisor and write the thesis. 

You seem to have had a bad experience at that university, so maybe you want to consider another university. Again talk to the student advisor at that new university and see if they can recognize (some of) the courses you finished from your original university.