It's easy. If you have to come here to ask this it ain't for you.
I wasn't aware this was a perfect person and expert only website, nor that everyone had the same enjoyment or expectations of behavior?
You've apologized, the only thing you can do is see if he forgives you. Communication is key in any relationship, especially more so in one with a dominant/submissive nature. If he doesn't respond, you know what you need to do in the future and might have to chalk it up into a learning experience.
If anyone is unable to communicate clearly, before committing to a relationship they might take the time to get to know each other better to help lessen the unsure reactions and dissatisfaction they might encounter with partners they didn't know well. Titles and relationships should be earned, not expected upon meeting. A master should be someone who keeps your interests in mind. A sub or slave should be one who has proven to want to please you. Trust is earned on both sides before a relationship can work.