Short story needs punctuation and grammar mistakes corrected

I have written my first (and last!) short story of just over 2700 words but the punctuation is of a poor standard. Whenever I attempt to correct my mistakes I end up making changes to the story which seems to be never ending Therefore, I need a person who can type at speed, correct grammatical errors and put in all the neccessary quotation marks, commas etc. I can then draw a line under this creative writing exercise