First off, telling them that you are a Satanist was probably a mistake. It is not wise to tell a Christian, or nearly anyone for that matter, that you are a Satanist. If you haven't read it already, it even says so in the book dictated by Satan, called the Al-Jilwah. "Do not mention my name nor my attributes, lest ye regret it; for ye do not know what those who are without may do." There can be exceptions of course, just remember that others won't accept your beliefs most of the time. In the end, it's up to you decide whether or not you want to tell someone your beliefs. Satan lets us make our own decisions based on our own judgement.
If you seriously want my advice on what to do, it might serve you well to have a certain spell cast. I'm sure someone would probably be willing to help you if you don't have the right experience for such a thing. Just don't ask me to do it, because I don't have that kind of experience. Anyways, I hope that gives you some ideas about what to do.
I know how you feel brother my mother found out I was an athiest, lucky she has no