If you provide more information we may be able to better advise you as to what steps you should take to remedy your current situation. Are you certain your domain is not what is blocked? It's a bit unclear what step in the process you are having issues with. When you say your facebook ad account got blocked we don't know if you mean the entire account can't be logged into, or you can't place a specific ad, etc...
What is the exact nature of your "blocking" problem?