Problem with forum account linking

[Koscrow]

I've been playing on NFSSA for quite some time now and also 2 years probably as I haven't logged into the forum. After the transition of the site to a new domain, I decided to check the binding of my account - in the game account wrote that the account is not bound to anything. 

Then I decided to go to the forum on my account (from which I write this thread) and saw that indeed - to my account is not tied to anything, then friends helped me by looking at the statistics of my account through the forum and we saw that it is tied to some “Koscrow9” which I never registered. 

Please help me to unlink my game account from a forum account unknown to me. 

Screenshots with proof that the account is mine - attached, if you need more - I will provide.