Don't feel bad, they owe you. They can always try to negotiate. In fact I would say they always try to negotiate on charges like this, but stick to your guns. I

Don't feel bad, they owe you. They can always try to negotiate. In fact I would say they always try to negotiate on charges like this, but stick to your guns. If they won't pay for a few hours of work then it's going to be a red flag for all other work anyway. Just my experience.