Response to referee after rejection
This is a waste of your time, and, more importantly, a waste of the time of people who already selflessly gave away their time working to give you feedback that helps you improve your paper, and to help the peer-review system function.

The best thing you can do is not ask the editor and referees to spend any more time on your paper, unless you are contesting the rejection decision in good faith. And use their feedback to improve your paper so that other referees and readers don’t reach the same erroneous conclusion that this referee did.