You can cancel a booked class up to 1 hour before the class begins. 

  1. Tap on home tab

  2. Scroll  to the 'Upcoming' class, click on the session and choose 'cancel  this session'

You can also cancel classes from your profile tab

  1. Tap on profile tab

  2. Select your Online GX Class Pack

  3. Scroll down to future class, click on the options button to cancel a class

To reschedule that class simply book another available class after canceling the current class.