I want to work in International Call Centre,but sir my problem is that I do not have good pronunciation as well as lack of fluency.

If only accent is a problem then better you join some class because there you will get opportunity to interact with other learners you can also get some language software these days many such software are available which helps in learning all skills of language including pronunciation

And also watch news channels like CNN/ BBC to get the hang of pronunciation . Start reading good books, pick new words, see the exact meaning of the word and how it is use in context of the sentence. Try and make a sentence using the same word in your local language. The minute you have done that do

If you clearly know the obstacle in your way to your goal then half of your problem gets solved automatically. Set the problem totally right by joining a institute near your place for learning spoken English. Try speaking English in front of someone who will keep correcting your mistakes. Practice w