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Try using a K12 Course...their relatively cheap and to teach LAC (Language and Composition) they are fantastic
Any free course?
Just go through these https://www.wiziq.com/tutorials/communication-skills-improvement does it help a little ? @ChiefArnav http://free-english-study.com/home/speaking.html a little more too. Another easy way is try to chat through skype or tinychat.
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I definitely recommend trying to use a live chat with a native speaker to work on your verbal. For written I'd recommend working through a good textbook. After that start reading progressively harder English books starting with books aimed at young children.
Examples of "good" textbook?
That's hard to say without knowing you and your personal situation. A good textbook doesn't have to be perfect, it just needs to give you enough of the basics that you can begin reading and writing English fluently. You might be at a level you can go ahead and begin reading kids books.