Stolen Account - Solution?

Hello dear CF NA Players.
After a few Month of CoD and other Shooters i really started missing Crossfire NA and wanted to come back, but as it happens usually, there happened something bad. My problem is the following: I had someone, who got access to my E-Mail Adress, which my Cf Account was registered on, so he had my Login info and Changed my E-Mail + My Password. The only things i can still proof are some old used Paysafecards and the security answer. I also have access to the E-Mail adress, i changed the password. But i dont know, usually nobody remembers his account creation date and thats my problem too. So what would be a possible way for me to get my account back? Looking forward to all answers. (ex) "Kuscheln."

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