i'm no expert, but just a thought. would u be able to contact Microsoft, explain your situation and recover your gamertag? If I remember correctly, when u set up your gamertag account and/or your MS Live ID, u had to create a personal question and secret answer in case u need to recover your gamertag. If u can proof to Microsoft that u r the real owner of the gamertag via the secret Q&A, then they may give it back to u. Just my 2 cents. Good luck.