When you hire a ghostwriter, it doesn't mean that the freelancer will do all the work while you just wait for the end result. You need to be involved in every step of the process. After all, it is your work and name that will be represented as the end product.
This is something to really remember when working with a freelancer/agency that is ghostwriting your project. Even though ghostwriters are professionals who write for a living, they will never be able to express your original thoughts and express your voice through the texts they write for you.