You probably spoke to someone in Customer Services instead of the Modular Office, which runs the one-day brush-ups.
e-mail
[email protected] for details of one-day courses, telling Dena which course(s) you need. Or ring her on 01865 844334. OAT lay courses on when they're needed when they have sufficient demand. The more students who let OAT know that they're interested, the quicker they can lay on a course.