Dear Tanya, I can recommend you that you should try to prepare your English paper on yourself, because you have only 2 weeks left for it. Instead of wasting your time for searching institute for your writing works, you can find some good essay writing book in your nearby book store that will surely helpful to you.
In this way you can save your money as well as your precious money plus inner confidence too. After that this work you can contact some good tuition classes for effective English writings.