Learning reasons

I am learning English because right now, I am studying in a english speaking country, South Africa. I have started studying for my Masters six months ago, and I still have one year left. I have been in South Africa for one and half years now, but my english is still very poor in vocabulary and with bad pronunciation. I would like to improve my speaking and writting since I need to talk to many people and I have to write a thesis. I would like to make note that I am from Madagascar which is a French speaking country, though my french is not that perfect because Malagasy people speak the same language, Malagasy, so we do not need to speak french to communicate to each other like in some other African countries.