So what happens if the person misses the 24h acceptance timeframe? Do i get my money back or did I just waste a ton of money?
If the seller doesn't accept the order in the timeframe, it will be cancelled automatically. After an order is cancelled, the money is credited to your Udimi account on the Money page. It will be automatically used on your next order.
Alternatively, if you want the money to be refunded, you can find the Refund option in the Money section.
Have a look at this tutorial on how you can make a refund: https://udimi.com/help/a/refund-on-my-order.
I hope this information finds you well. Please don't hesitate to get in touch with Udimi Live Chat from the Help page if you'll have any questions.