DUI class question

I recently got signed up for the classes, and was scheduled for Saturday and Sunday, over a week in advance. Tuesday they call me and say it's rescheduled for Friday and Saturday. When I signed up they said if it was missed for any reason, I'd have to repay. Thank GOD, my job is relatively flexible with hours, but what would happen if someone couldn't get off work? They just expect them to take the hit to their job, their pay? Pretty fucked up. I get we made mistakes, but it feels like people within this system continually try to keep us down and in this loop. Don't get me started on the PO lol.