how to retrieve parent email on windows phone my family?

[Rishabh]

I had set up a microsoft account for windows phone 8, but the age was under 18.
So microsoft asked me to set up "my family" to download apps and games.
After that my parent created another microsoft account and accepted the terms of use.... etc etc. and set up my family on windowsphone.com .
I was able to download apps and games from the minor account.
Then after some months the store terms and conditions changed, and it required my parent to authenticate my account again.

But this time my parent has forgotten both his email and password. What can I do to retrieve the email of my parent??

My parent created a new account, but he cannot add my minor account to the new account.
there is an internal server error. What should I do to download apps and games from my minor account?