i really messed up today and managed to do both coasts structured and the coasts essay questions, is there any chance id get any sorts of marks for that. also is it possible to only resit one paper?
No, not that I am aware. The format is that you need to do 3 different sections, and the section in which you do your essay cannot be done in the shorter answers (hence 3 sections).
From what I know you'll get marked for either your essay or data response, I believe you will get given the marks for the section you did best in, and I don't know what it is like for you but for us yes you can resit only one paper