Collector's Edittion problem

I ve bought a cdkey for collector's edittion EU but i m a steam player and i cant reedem it only on GF website , what can i do to get the rewards cuz i dont want my 20$ go to waste for nothing hope someone will help me solving this problem , thx i appreciate it .

already did but i m in such a bad mood cuz of this that i m not patient enough for some1 to answer me and my time is restricted so i need to fix it as fast as i can so sorry for disturbing ya

i just dont want to think i wasted my money on smth wich is allowed to go through some sites