I’m sorry you had a bad experience on Fiverr. I feel like their cheerleader right now but I know there are some terrible sellers there … always have been. You can’t even always tell by the gig description because some sellers simply copy the description of someone else. But reviews do not lie. Hire someone with no fewer than 500 reviews, I would say, and all positive.
It’s always sensible to follow due diligence in submitting your first draft of your book to an editor by making as fool-proof a copy as possible for you because first, it is your own creation, and secondly, a horrid draft sent your editor can end up frustrating both you and him or her. Make your own corrections to the extent you can, so that will make the job of your editor that much lighter and the end result would be a lot more effective.