Hedgeleaf, two wrongs do not make a right. When you do that you are holding onto hatred and revenge. Let it go. Be kind and compassionate, and give your ex the phone number to his brother. Have you ever thought that he has ignored his brother also to have lost his number? When you give him the number you are getting rid of anything that ties you to his family, you are freeing yourself. Then you can move on, blessings