I can't login on EUWEST anymore but i can on EUNE?????

I play on EUWEST since season 5...today my gf put lol icon in the computer trashcan,nwhen i put the icon back on the desktop and tried to login my account doesn't login on EUWEST anymore,it says "your login credentials don't match an account in our system" but when i try to log on EUNE it works fine and i have a lvl 1 account with my summoner name????? does anyone knows how could that happen? i already sent some tickets to riot but i would like to have this fixed sooner. thanks. Also i should say that this problem also happens on the website...i'm currently logged here as a EUNE account... sorry for eventual grammar error...i did my best.
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