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Oh no! I'm so sorry you're having to deal with that. Very frustrating. The PayPal transaction can be a little tricky, as you mention, on account of the association between emails + card numbers. Because it is occurring within PayPal's database itself (paying against a balance, using different cards for the same email, etc) we are provided very little visibility into the transaction itself. I know that isn't helpful but here are the two options I'd suggest (in order of ease): If you want to use a different card ... try using a different email when registering and paying If you want to use the same card, I would contact PayPal support. They can get it all sorted out. PayPal's customer support line is: (888) 221-1161 I wish I could be of more help. I imagine this must be frustrating. Thanks for your interest in class and hope to see you there!