a letter of complaint

i want a native and local American writer. the content is about unfair treatment . the professor thought i plagiarized the final research paper because of the changeable writing styles and the progress on the grammar ！(thx to the dictionary) while the turnin software is just 5%! He said nothing when i submitted the draft. i followed his suggestions to modify the draft but he still regarded me as academic misconduct just because my grammar is too native? balabala …