According to the Refund Policy that is published on Greatassignmenthelp.com, your assignment can’t be revised if you’re not satisfied with its quality. However, it takes them about 30 days, which makes this service just useless. If you expect to receive the document in 12 hours, you don’t have a month. Besides, you pay more when you need an urgent assignment, and it is nonsense when they work on it for 30 days.