This would probably be considered a violation of your right to privacy, since it was a release of information that the average, reasonable person would find offensive to be released. You may therefore have a legal cause of action. You should consult with an attorney--many will provide a free or inexpensive initial consultation--to see whether you do have claim and, based on all the circumstances, what it might be worth. (A lot will depend on exactly what that information was, the relationship between you and your ex, what she has or might do with it, etc.) If you don't wish to involve an attorney, you could contact the phone company's legal department and/or regional managers/executive's officel, explaining what happened, letting them know that you consider this a serious breach and that you are contemplating legal action, and demanding compensation; then see if they offer you anything. Involving an attorney, however, is much more likely to get you results.