I have a chargeback on an order that was placed five days ago?

Sold Friday night. I dropped it off at UPS on Tuesday. Today I get a notification there’s a chargeback. It’s an order from a business customer to a college. I’m not sure how to handle this. It wasn’t even an expedited order. I’ll provide the information they need, but am I really going to get a ding on my account for this/be out $30?