I booked a class for my cousin and I and they said...

I booked a class for my cousin and I and they said she can't get in because she not in a class, but we paid for it. They basically said she can't enter a class that I paid for cause she wasn't in (a class). But in order for anyone to pay for anything on the site you have to choose a class. Also we showed them our online payment and they seen that I paid for it but still didn't let her in the class cause she wasn't in the list for it. They also won't refund my money and when I called customer service no one answered. Really bad service.