Personally from my experience their help is quite disputable since you still won't have any knowledge on the subject of your essay. I would suggest you to make it yourself and use additional help only in cases when you need something besides that. For example, I had a task to make a presentation on the subject of my essay and I decided to commission custom whiteboard animation topexplainers.com for that it and it worked flawlessly. Think about it, maybe you will consider changing your approach