Forgot my E-Mail.

Hi Guys
I have an other acc btw my main one and i forgot my Email Adress. I Never changed Pw or E-Mail thats why i forgot it and the Account is Registers since January 2011.. its a while and i have no clue which E-Mail i used back then. I Need it cause i want to secure my account. I already sent an Support ticket to the Staff but they cant help me cause they Need more Information.. information that I dont know anymore. What can I do now? They wont believe me that i am the owner.