@J10
Its worth trying, You need to let them know that you are very serious to attend your class on time and also to give your self a time to prepare and do travel arrangements. Its not that easy to go to other place in just a short period of time. I am also planning to visit CIC sometime next week if I dont received any response from them til saturday.
And also ask your school if just in case your permit does not come on time what are your options?