Let's talk about the elephant in the room. 
Is it ethical to use essay writing services?
This article here explains both side of using essay writing services.
https://www.selfgrowth.com/articles/is-it-ethical-to-use-essay-writing-services?
Its more a morality questions rather than being legal. Obviously, you can use a trusted essay writing company like https://peachyessay.com/ and will never get caught. But the question is if its right to do so. In short, the answer is yes and no both together. It really depends on many factors that article tries to discuss.
Is it ethical to use essay writing services?This article here explains both side of using essay writing services.
https://www.selfgrowth.com/articles/is-it-ethical-to-use-essay-writing-services?
Its more a morality questions rather than being legal. Obviously, you can use a trusted essay writing company like https://peachyessay.com/ and will never get caught. But the question is if its right to do so. In short, the answer is yes and no both together. It really depends on many factors that article tries to discuss.
I do not recommend using that, since you do not learn and you do not have the capacity to solve it yourself, it is a double-edged sword, on the one hand you solve a problem but on the other hand you can get used to it and not take the ability to do tests. Apart from the economic point of view is harmful because they are expenses.