There was a problem logging in with this acc you may not have a world of warcraft game attached to your acc or you may be logging into a region deifferent from the one you created the acc in plz can u help me
PEGI is the EU version of the rating system and ESRB is the American.
Also when you log into Battle.net using "Account" at the top of the page what region is in the bottom right?
It should say "Europe - English (EU)"
Please change the password associated with your account from Account Management. You can change it back if you want to, I just reckon that this will help you log in (Blizzard works in mysterious ways).
If you could respond letting us know if that's helped or not, it would be appreciated. :)