Hi,
I suggest that you contact the regional service center for your region/country. Provide them with as much information as you can and they will locate your record and help you link it to your Microsoft Account. Here is the URL:
http://www.microsoft.com/learning/en-us/help.aspx#north-america
If you have score reports from earlier exams, or you know your old telephone numbers or Live ID, send that in the email.
Good luck.
Mike
Mike Corkery, MCT, MVP (Office Systems), MCSD (Windows Store Apps), MCITP, MCPD, MSF, etc. Please do not forget to click “Vote as Helpful” if any post helps you and "Mark as Answer”if it solves the issue.