Where i can study for english speaking cource in kolkata

If you think you need quality coaching provided you have time and money, the best answer is to get coaching professionally from British Council - https://britishcouncil.org

The best institute is Ramakrishna Mission Golpark, where at any how u will have to speak English and here fees is also very low. And some other institutes are British Institute, Oriencall tech, CMC computer academy etc. But best is Ramakrishna Mission.