As an essay writer your main task is to research and develop a coherent argument within the quite formal structure of an essay. Grammar spelling and punctuation are extremely important when writing an essay on a subject which calls for good language skills - English Literature for example. However an essay on other subjects also needs to adhere to similar grammatical standards. The rules of grammar exist for a positive purpose such as ease of communication and to avoid ambiguity not simply for some arcane reason lost in the mists of time.
No-one else could (or should) write your essay for you in your own style with your own research. Whether you would be able to write the same essay to the same standards without some appropriate essay assistance is a different matter. Your thoughts and opinions are your own but words and their accurate use are common to everybody. At the end of the day you should have pride in your essay. It is what represents you and you alone.
A regular freelance writer and poet. I have a personal storehouse of over 500 poems more than a dozen short stories. I have written in newspapers magazines and journals for a net of over 10 years. I started with writing early in school and have never looked back since.