But I talked with examination controller of WBJEE 2018, Then he replied in positive.

In that case, please contact him again and ask him how to go about changing your choice of exam centre. The brochure says otherwise.

Sab bakwas hamane change kar liya between 26th January to 28th January 2018.
Thank you. Jara dimaag lagaya karo kewal Career360 nahi.

Thank you for your response. Most exams don't entertain change of exam centres. The brochure of WBJEE also states that. But since you are able to get it changed by calling them up, congratulations to you. And since you are a student, my advice to you would be to be dignified in your language as it will certainly help you in your future endeavours.
All the best.

O sorry it was students habitat. Really .