Can you recommend a reliable editing service for a non-native speaker finishing their MBA capstone thesis, specifically for grammar and flow improvements before the final submission?

I am a senior MBA student currently wrapping up my final capstone project, but as a non-native English speaker, I am really worried about my academic tone and grammar. I have tried using basic spellcheckers and Grammarly, but they aren't catching the nuances in my business analysis that my advisor keeps flagging. I have a firm deadline in two weeks and a limited budget, so I need to find a service that doesn't just rewrite everything but actually helps me polish my own ideas. Could you suggest a professional proofreading service that has experience with graduate-level business papers and won't break the bank?