I agree with Chuckdom19...I'm sure there is more to this punishment than you've said. What's a few slaps on your balls? I would have you use a ping-pong paddle if my slave had disrespected me in such a public manner. In fact, I would have any slave of mine paddle his balls until they were ready to explode every morning and post a short clip of that punishment here! You should be down on your knees slave, begging your Mistress's mercy!
In fact, I think a bit of figging might be in order...