Log onto your myacca account. Go to the exam entry tab. When that page opens, at the top of the page you should see a bar that says ‘Amend your June 2014 entry’.
It will redirect you to the page when you were first selecting what exams to write. Uncheck your selection and press next to proceed. It will reconfirm your decision to not write this Jun 2014. Unfortunately, you won’t get your money back (I am not too sure about this.) Press next and voila, you have removed yourself from this Jun exam.
Remember you can only make amends to your entry till April 8th!