Late SAQ

I know. Im a massive idiot, I confused the emails between Nottingham and Surrey about extenuating circumstances. I thought that the supportive documents email from Surrey was the documents I was supposed to upload for extenuating circumstances but informed them (Nottingham) that I couldn’t because I didn’t have them with me right now which they (again Nottingham, said it was fine). So I thought I was all good. Then my heart dropped when I realised they requested a veterinary medicine and science form (which is the supporting document they were talking about) on October 22 (i submitted it a few hours past the deadline). Do I withdraw my application so I can at least use the slot to apply to a back up course??? What do I do?!