Hi I have had just such an experience while finishing my PhD, I had required professional help in getting my PhD research edited, to meet the standard of my University. I availed help from the website: https://www.regentediting.com/services/. They had provided prompt help and even the price had been considerable in accordance with the length of my project. They would share with you edited drafts at brief intervals so that your guide can provide feedback on the work done. Their nuanced approach helped me greatly, hope it helps you too. All the best.