<prompt> Human: Hi, so I made a mistake earlier today. I missed a CPR certification class that I paid 75 for. I rescheduled my class and asked the trainer if I could get any of my money back and he said no, but he can give me 25 off the next class because he has already printed my certification card, this may seem like a nice thing, but the card would be rather useless to him. Would I be able to file a charge-back in this situation to get my money back, because Im essentially paying 125 for a 75 class? I do realize it is my fault for missing the class, but I feel he should give me a better discount, because it was not like a one on one class it was a big group class. If i can not file a charge-back leave any suggestions you can think of, thanks.  <response>: Haha if everyone can just charge back things they signed up for but didnt use... 