REFUSAL OF A SHORT TERM STUDENT VISA PLEASE HELP

Hi i applied for a short term student visa 12 days ago, and it was denied because i didn't provide proof of my university studies in my home country and the invitation letter wasn't notaried by a solicitor. I would like to apply again now that i know which documents i need, but i don't know if i can send the evidences of my studies and my notaried invitation letter to the ECO visa officer for they reconsider the desicion or if i have to make again the visa application form, Schedule an appointment and pay again all the fees for the procedure. Thank you