Hey Chris, just saw your comment. We think the problem is with our booking system because when a class is booked it flips you into the next available.
A message should have appeared before you pay to to ask please check your class is correct because this can happen due to competition to get a spot but if your requested class is fully booked and it is a genuine mistake we will always refund you or give you a credit note. We are sorry you have had this experience.
Thanks Sarah, so good to hear you found it helpful.
Thanks Anne, so good to hear!